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Wheatstone Corporation VP-8IP Technical Manual

Digital multimode audio processor
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VP-8
iP
D
M
a
P
igital
ultiMoDe
uDio
rocessor
TECHNICAL MANUAL
600 Industrial Drive, New Bern, North Carolina, USA 28562

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  • Page 1 VP-8 igital ultiMoDe uDio rocessor TECHNICAL MANUAL 600 Industrial Drive, New Bern, North Carolina, USA 28562...
  • Page 2 U lt r a - H i g H r e s o l U t i o n P r o c e s s i n g VP-8 Digital Multimode Audio Processor Technical Manual - VP8 GUI version 4.X.X.exe ©2013 Wheatstone Corporation 600 Industrial Drive New Bern, North Carolina 28562 tel 252-638-7000 / fax 252-637-1285...
  • Page 3 This equipment must be installed and wired properly in order to assure compliance with FCC regulations. Caution! Any modifications not expressly approved in writing by Wheatstone could void the user's authority to operate this equipment. VP-8IP / Sep 2013 e ad...
  • Page 4 ORSIS Ultra-HigH resolUtion Processing Adding VP-8 To The Peripheral Devices* Tab In order to utilize all the features of the VP‑8 Digital Audio Processor the device must be added to the System Peripheral Devices tab in the Wheatstone WheatNet-IP Navigator program (aka the Navigator GUI).

  • Page 5: Table Of Contents

    Example Schematic of General Purpose Inputs ............1-12 User Presets ......................1-13 GPO ........................1-13 Analog XLR Connections Pinouts Drawing ...............1-15 Digital XLR Connections Pinouts Drawing ..............1-16 BNC Connections Pinouts Drawing ................1-17 Ethernet RJ-45/GPI DB-9 Pinouts Drawing .............1-18 page Contents – 1 VP-8IP / Sep 2013...
  • Page 6 MP3/AAC<48kHz Mode ..................2-16 NETWORK ......................2-17 VERSION ......................2-17 ACCESS .......................2-17 Adding VP-8IP to a WheatNet-IP System ........2-18 Achieving the Desired Sound ............2-20 First a Few Words About Our Factory Presets ............2-20 What Sound Are You Trying to Achieve? ..............2-20 About Bass ........................2-20...
  • Page 7 First, a short tutorial ..................4-15 Bargraph Metering....................4-16 Selectable Meter ....................4-16 AES And TX Output Meters ................4-17 60dB Range ......................4-17 Display Signal Selection ..................4-17 Input .........................4-17 PreDelay ......................4-17 Audio ........................4-18 Gain Reduction ....................4-18 Controls ......................4-18 page Contents – 3 VP-8IP / Sep 2013...
  • Page 8 Creating a Weekly Rotation Event ..............4-37 Creating a Long Term Rotation Event ............4-38 Deleting a Scheduled Event ...............4-38 Set Time ......................4-39 Side Bar Region ......................4-40 Preset ........................4-40 Save ........................4-40 Library ........................4-41 Devices .........................4-41 Quick Save (QSave) ....................4-42 page Contents – 4 VP-8IP / Sep 2013...
  • Page 9 FM Look Ahead Limiter Controls .................5-20 Look Ahead Limiter Enable ................5-20 L/R Linked ......................5-20 Lim/Clip (Limiter/Clipper) Drive ................5-20 Attack .......................5-21 Release ......................5-21 Delayed Release ....................5-21 Clip Style (Main Clipper) ...................5-21 Diversity Delay ......................5-22 page Contents – 5 VP-8IP / Sep 2013...
  • Page 10 Final Equalization Screen .................5-38 AM Look Ahead Limiter ..................5-39 AM Look Ahead Limiter Controls .................5-39 Look Ahead Limiter Enable ................5-39 L/R Linked ......................5-39 Final Lim/Clip (Limiter/Clipper) Drive ..............5-40 Attack .......................5-40 Release ......................5-40 Delayed Release ....................5-40 page Contents – 6 VP-8IP / Sep 2013...
  • Page 11 Phase Reverse .....................5-59 Left Right Reverse ....................5-59 Analog Output ......................5-59 Digital Output .......................5-59 VP‑8 AM-HD Process Mode ............5-60 Limiters Menu ......................5-60 Multiband Limiter ....................5-60 AM‑HD Multiband Enable ....................5-61 Multiband Drive ....................5-61 page Contents – 7 VP-8IP / Sep 2013...
  • Page 12 Release Time Screen ..................5-81 Final Equalization Screen .................5-82 The Vorsis Spectral Energy Gate™ ..............5-83 MP3/AAC>48K Menu ....................5-84 Multiband Drive ....................5-84 MP3/AAC>48K Look Ahead Limiter ..............5-84 MP3/AAC>48K Look Ahead Limiter Controls ............5-85 Look-ahead Limiter Enable ................5-85 page Contents – 8 VP-8IP / Sep 2013...
  • Page 13 Look-ahead Limiter Enable ................5-102 Lim (Limiter) Drive ....................5-102 Attack ......................5-103 Release ......................5-104 Delayed Release ....................5-105 Mono Output .......................5-105 Phase ........................5-105 Left Right Reverse ....................5-105 Analog .........................5-106 Digital Output ......................5-106 Appendix Parameters, Units and Ranges .............A-2 page Contents – 9 VP-8IP / Sep 2013...
  • Page 14 Example Schematic of General Purpose Inputs ............1-12 User Presets ......................1-13 GPO ........................1-13 Analog XLR Connections Pinouts Drawing ...............1-15 Digital XLR Connections Pinouts Drawing ..............1-16 BNC Connections Pinouts Drawing ................1-17 Ethernet RJ-45/GPI DB-9 Pinouts Drawing .............1-18 page 1 – 1 VP-8IP / Sep 2013...

  • Page 15: Introduction

    The VP-8 can be remotely controlled from anywhere via a TCP/IP network connection and Windows-based GUI (Graphical User Interface) software applications. page 1 – 2 VP-8IP / Sep 2013...
  • Page 16 Wheatstone Corporate Headquarters New Bern, North Carolina, USA Wheatstone Corporation is a world-leader in broadcast audio equipment design and manufacturing. Our products include audio consoles for the radio and television industries, audio control surfaces and digital audio networks, and our award win- ning digital audio processors.

  • Page 17: Overview

    1 – 4 VP-8IP / Sep 2013...

  • Page 18: Rack Mounting

    The unit has no user‑serviceable parts inside! If you have a problem the unit must be returned to Wheatstone Corporation for repair. Installation Tips: • Place any surge protection circuits as close as possible to the VP-8 or other device being protected.

  • Page 19: Where To Install The Vp-8 Ip

    STL because of the inability of many service providers to guarantee flat frequency response and proper phase matching between circuits. Furthermore, in many countries analog circuits such as these are being discontinued or the cost has been raised to prohibitive points. page 1 – 6 VP-8IP / Sep 2013...

  • Page 20: Digital Stl

    Use of a UPS (uninterruptible power supply) is a good idea and will protect the VP-8 from short duration power interruptions which may cause it to reboot. During boot up, audio is interrupted for approximately 20 seconds. page 1 – 7 VP-8IP / Sep 2013...

  • Page 21: I/O Connections

    Pin 3 XLR RT LO – LINE RT IN LO AES In – XLR-F Pin 1 XLR SH – AES IN SH Pin 2 XLR HI – AES IN HI Pin 3 XLR LO – AES IN LO page 1 – 8 VP-8IP / Sep 2013...

  • Page 22: Sca In

    AES inputs even if those inputs are not selected to feed the audio processing chain. page 1 – 9 VP-8IP / Sep 2013...

  • Page 23: Network Connection

    White/Orange White/Green TXD - RXD - Orange Green RXD + TXD + White/Green White/Orange RJ-45 RJ-45 Plug Blue Blue Plug White/Blue White/Blue RXD - TXD - Green Orange White/Brown White/Brown Brown Brown page 1 – 10 VP-8IP / Sep 2013...

  • Page 24: General Purpose Interface (Gpi/Gpo)

    6.0 VDC 470 Ohms 7.5 VDC 820 Ohms 10 VDC 1.3 kOhms 12 VDC 1.8 kOhms 15 VDC 2.4 kOhms 24 VDC 3.9 kOhms 30 VDC 5.1 kOhms 48 VDC 9.1 kOhms page 1 – 11 VP-8IP / Sep 2013...
  • Page 25 G E N E R A L I N F O R M A T I O N page 1 – 12 VP-8IP / Sep 2013...

  • Page 26: User Presets

    The optoisolators on the GPO are rated at a maximum of 350 Volts AC or DC and with a maximum load current of 100mA. Because of the AC rating, external circuit polarity is unimportant and therefore we will simply define the GPO pins as “Source” and “Return.” page 1 – 13 VP-8IP / Sep 2013...
  • Page 27 Pin 3 – GPO 2 Return Pin 7 – GPO 2 Source Pin 4 – GPO 3 Return Pin 8 – GPO 3 Source Pin 5 – GPO 4 Return Pin 9 – GPO 4 Source page 1 – 14 VP-8IP / Sep 2013...
  • Page 28 XLR RT-M PIN 1 XLR RT SH - LINE RT OUT SH PIN 2 XLR RT HI - LINE RT OUT HI PIN 3 XLR RT LO - LINE RT OUT LO page 1 – 15 VP-8IP / Sep 2013...
  • Page 29 AES Out / baseband192 - XLR-M XLR-M PIN 1 XLR SH - AES / BASEBAND192 OUT SH PIN 2 XLR HI - AES / BASEBAND192 OUT HI PIN 3 XLR LO - AES / BASEBAND192 OUT LO page 1 – 16 VP-8IP / Sep 2013...
  • Page 30 PIN 2 BNC 1 SH - TX 1 OUT SH - SHELL BNC - TX PIN 1 BNC 2 HI - TX 2 OUT HI - CENTER PIN PIN 2 BNC 2 SH - TX 2 OUT SH - SHELL page 1 – 17 VP-8IP / Sep 2013...
  • Page 31 GPO 2 OUT RETURN GPI 4 IN (+) GPO 2 OUT SOURCE GPI 3 IN (+) GPO 1 OUT RETURN GPI 2 IN (+) GPI 1 IN (+) GPO 1 OUT SOURCE GPI COM (-) page 1 – 18 VP-8IP / Sep 2013...
  • Page 32 MP3/AAC<48kHz Mode ..................2-16 NETWORK ......................2-17 VERSION ......................2-17 ACCESS .......................2-17 Adding VP-8IP to a WheatNet-IP System ........2-18 Achieving the Desired Sound ............2-20 First a Few Words About Our Factory Presets ............2-20 What Sound Are You Trying to Achieve? ..............2-20 About Bass ........................2-20...

  • Page 33: Ip Quick Start Setup Guide

    Quantity 1 AC Power Cord Quantity 1 Wheatstone Warranty Card Quantity 1 The photo below shows the rear panel of the VP‑8 with various connectors associated with an installation: VP‑8 Rear Panel Connections page 2 – 2 VP-8IP / Sep 2013...

  • Page 34: Steps To Success

    If you have an exciter that provides a balanced composite input (most do, even though the input is a BNC connector) the best possible signal to noise performance will be obtained by using the VP‑8 balanced outputs. page 2 – 3 VP-8IP / Sep 2013...

  • Page 35: Introducing The Vp-8 Ip

    To turn the volume up, press in the lighted pushbutton and hold it while turning the rotary encoder clockwise. The relative position of the control is shown by digits ranging from “0” to “100,” with “0” being “Off” and “100” being full volume. page 2 – 4 VP-8IP / Sep 2013...

  • Page 36: Configuring The Ip Address

    GUI (see page 2-6 or 3-4), or left at the factory default setting, you will still need to set up the GUI with the VP‑8 IP address before the GUI will be able to control the unit. page 2 – 5 VP-8IP / Sep 2013...

  • Page 37: Operating The Vp-8 Ip Remotely-Installing The Gui Software

    Guru software. Then right click on the control area of the GUI and select Hardware/Assign IP Address. The window on the right (Figure 1) will appear. Figure 1 VP‑8 IP Address Configuration page 2 – 6 VP-8IP / Sep 2013...

  • Page 38: Telling The Gui How To Find The

    . This is done by adding to the list of devices that the VP‑8 knows about. To do this: - Right click on the control area of the Guru and select Devices. - The following Devices window will pop up: page 2 – 7 VP-8IP / Sep 2013...
  • Page 39 IP address 192.168.1.194, then the PC’s IP address must be between 192.168.1.1 and 192.168.1.254, noting of course that the VP‑8 and GUI PC cannot share the same IP address. page 2 – 8 VP-8IP / Sep 2013...

  • Page 40: Additional Notes On

    TCP may be used when metering data via UDP does not work because unsolicited UDP packets are being blocked. The system menu has the UDP/TCP metering option. page 2 – 9 VP-8IP / Sep 2013...

  • Page 41: Installation And Setup Using The Front Panel

    The active preset will be displayed in the front panel alphanumeric display and will scroll if the name is longer than eight characters. The VP‑8 will respond with TAKEN when the preset is loaded and running. page 2 – 10 VP-8IP / Sep 2013...

  • Page 42: Mode(S)

    ANALOG ANALOG GAIN DIGITAL DIGITAL GAIN WHEATNET-IP We strongly recommend that peak input audio levels are never set so that they peak higher than about -12dBFS as shown on either the GUI or the VP‑8 ’s front panel meters. This caution is necessary to allow appropriate headroom for the processing algorithms when they are presented with material that has been highly compressed and possibly also clipped during the mastering process. Such material can achieve far higher peak levels after the first stage of signal processing and those signals may not have enough headroom to avoid clipping within the processor if the input level was already too high. page 2 – 11 VP-8IP / Sep 2013...
  • Page 43 What they lack however is the built-in intelligence, pair of 8-channel utility mixers and other specialized technologies that reside inside an actual BLADE. page 2 – 12 VP-8IP / Sep 2013...

  • Page 44: Output

    PILOT PILOT INJ % SCA 1 SCA 1 LEVEL dB SCA 2 SCA 2 LEVEL dB DIG OUT AES3 DIGITAL LEVEL dBFS DE-EMPH BASEBAND192 L/R Mode AES3 Mode Baseband192 Mode MPX Mode page 2 – 13 VP-8IP / Sep 2013...

  • Page 45: Am Mode

    5.0kHz ANALOG OUT 5.5kHz 6K CCIR 6.5kHz 7.5kHz 10kHz NRSC OUT MODE MONO POSMOD 100-150% STEREO ANALOG 1 LEVEL dB PHASE ANALOG 2 LEVEL dB PHASE DIG OUT DIGITAL LEVEL dB DE-EMPH page 2 – 14 VP-8IP / Sep 2013...

  • Page 46: Fm-Hd Mode

    DIGITAL INPUT PHASE PREDELAY L/R SWAP ANALOG OUT AM-HD Mode HEADPHONE SOURCE INPUT OUTPUT ANALOG LEVEL dB ANALOG INPUT (AM-HD) DIG OUT DIGITAL LEVEL dB DIGITAL INPUT PHASE PREDELAY L/R SWAP ANALOG OUT page 2 – 15 VP-8IP / Sep 2013...

  • Page 47: Mp3/Aac>48Khz Mode

    DIGITAL INPUT PHASE PREDELAY L/R SWAP ANALOG OUT MP3/AAC<48kHz Mode HEADPHONE SOURCE INPUT OUTPUT ANALOG LEVEL dB ANALOG INPUT (<48K) DIG OUT DIGITAL LEVEL dB DIGITAL INPUT PHASE PREDELAY L/R SWAP ANALOG OUT page 2 – 16 VP-8IP / Sep 2013...

  • Page 48: Network

    It is not possible to lock the front panel without first setting a password for it. Likewise, if the front panel has been locked it cannot be accessed without first entering the valid password. page 2 – 17 VP-8IP / Sep 2013...

  • Page 49: Adding Vp-8Ip To A Wheatnet-Ip System

    ’s Input and output signals are present and available for routing. Note that as shown in the example at left we’ve used Navigator’s signal name editing capability to assign VP‑8 ’s input and output signals the names we desire. page 2 – 18 VP-8IP / Sep 2013...
  • Page 50 WheatNet-IP system may be found in the WheatNet-IP System product documentation. Assistance in configuring VP‑8 for WheatNet-IP may be obtained by giving us a call at (252) 638-7000 or by emailing techsupport@wheatstone.com. page 2 – 19 VP-8IP / Sep 2013...

  • Page 51: Achieving The Desired Sound

    Program energy at the frequency extremes is typically several dB below that in the more easily heard midrange. Because of the nuances of human hearing, very low and very high frequencies take a lot more modulation power to become page 2 – 20 VP-8IP / Sep 2013...

  • Page 52: What Is Your Short Term Goal

    When loudness isn’t the first priority your options open up quickly! Being “cleaner” than the other signals increases a listener’s time spent listening. page 2 – 21 VP-8IP / Sep 2013...

  • Page 53: Clean And Loud

    AGC against the faster time constants of the compressors. This is accomplished by operating the AGC Backoff control at negative numbers greater than about -2.0dB to -3.0dB, causing more gain control to be accomplished using the page 2 – 22 VP-8IP / Sep 2013...
  • Page 54 In this scenario you may have to come up with a way to reduce the contribution of the reverb, but only when talent microphones are on. page 2 – 23 VP-8IP / Sep 2013...
  • Page 55 ORSIS Ultra-HigH resolUtion Processing VP-8 Front Panel Menu page 2 - 24 VP-8IP / Sep 2013...
  • Page 56 PARAMETRIC CALCULATOR LIMITER CONDITIONING EQUALIZER COMPRESSOR BASS MATH TOOLS Headphone Monitoring Points 4-BAND <48k CODEC OVERSHOOT LOOKAHEAD 8 BAND LIMITER PARAMETRIC LIMITER CONDITIONING CALCULATOR EQUALIZER BASS MATH TOOLS VP-8 Signal Flow Diagram page 2 - 25 VP-8IP / Sep 2013...

  • Page 57: Ip Audio Processing Guru

    Additional Notes On VP‑8 Network to GUI Connectivity........3-17 Unlocking the Front Panel............3-17 Contacting Wheatstone Technical Support....... 3-18 Pro GUI – What It Is And How to Obtain It........3-18 page 3 – 1 VP-8IP / Sep 2013...

  • Page 58: Introduction

    Factory preset’s default sound. ‑ The second page of Guru is the Calibrate Input/Output page and hosts the Input and Output Calibrations, Headphone Monitor Source, Input Audio Source and Audio Failover behavior selectors. page 3 – 2 VP-8IP / Sep 2013...
  • Page 59 Note that for user convenience we’ve repeated the appearance of some of the controls across various pages noting that the Input, Output and processing‑related metering are always visible on all three pages. Calibrate In/Out Adjust Sound Configuration page 3 – 3 VP-8IP / Sep 2013...

  • Page 60: Installing The Guru Software

    MAC address entered in this step. If the MAC address is entered incorrectly, the VP‑8 will never hear it, causing it to remain on its factory default IP address! page 3 – 4 VP-8IP / Sep 2013...

  • Page 61: Device Configuration-Connecting To The Vp-8 Ip

    7. Then, in the Devices dialog box, highlight (single left click) the VP‑8 device that you just added and click the Select button. This step tells the GUI specifically which VP‑8 you want to connect to next. page 3 – 5 VP-8IP / Sep 2013...

  • Page 62: Setting The Input Audio Levels

    NOTE: To ensure proper headroom inside the processor’s algorithms frequent peak levels exceeded the ‑12dBFS Ref marking on the Input meters are strongly discouraged. Output Meters Input Meters page 3 – 6 VP-8IP / Sep 2013...

  • Page 63: Setting The Output Audio Levels

    We frequently add new presets to our Wheatstone Processing website for customers to download and play with. Presets can easily be installed into our VP‑8 using the Preset management features of either Guru or Pro GUI (more about Pro GUI later on…). page 3 – 7 VP-8IP / Sep 2013...

  • Page 64: Tuning Audio Processing - An Introduction

    (once for each control). The resulting number represents how many different sound textures that could be made with one Factory preset – Guru’s Six Adjust Sound Controls the number is 1,771.561. page 3 – 8 VP-8IP / Sep 2013...

  • Page 65: Six Controls! Why Not Just One

    – the same limit that Pro GUI would bump into if it were being used. The following graphic illustrates this. page 3 – 9 VP-8IP / Sep 2013...
  • Page 66 Factory presets, even when the adjustment range seems to be inexplicably restricted by control limits that are not seen by a Guru user. page 3 – 10 VP-8IP / Sep 2013...

  • Page 67: The Six Tweakers

    A lower Density setting will also be less loud to the ear even though the peak levels have not changed. Loudness can be made up by using the Loudness tweaker described next. page 3 – 11 VP-8IP / Sep 2013...

  • Page 68: Loudness

    Conversely, the more the control is turned towards zero, the less low end the audio will have. The control will reset back to “5” if the factory preset is retaken. page 3 – 12 VP-8IP / Sep 2013...

  • Page 69: Guru Caveats

    Preset” dialog, shown on the right, and you know for sure that the preset being adjusted is a virgin Factory preset, simply recall the preset again using Guru and the error should disappear. page 3 – 13 VP-8IP / Sep 2013...

  • Page 70: The Other Two Pages Of Guru

    But there are two other pages of Guru that need some explanation too, the ones that are reached using the Calibrate Input/Output and Configuration buttons. Below is the Calibrate Input/Output page for the FM Mode. VP‑8 Guru Calibrate Input/Output Page page 3 – 14 VP-8IP / Sep 2013...
  • Page 71 Note that for convenience the headphone volume control appears on all pages of Guru and the headphone source selector is present on both the Calibrate Input/Output and Configuration pages. page 3 – 15 VP-8IP / Sep 2013...
  • Page 72 Device configuration dialogs. VP‑8 Guru Configuration Page Device configuration was covered earlier in this chapter. Preset, or Event, Scheduling is covered in the next chapter, which describes the Pro version of the GUI. page 3 – 16 VP-8IP / Sep 2013...

  • Page 73: Additional Notes On Vp-8 Ip Network To Gui Connectivity

    PW:0000 prompt appear, with the first digit (the first 0) flashing. Turn the knob to select the first digit of the passcode and press the rotary knob or the illuminated “W” button to accept this digit. page 3 – 17 VP-8IP / Sep 2013...

  • Page 74: Contacting Wheatstone Technical Support

    Visit our website http://wheatstone‑processing.com and sign up under Home button to receive Pro GUI at no charge. Via e‑mail we’ll provide you with login credentials, tell you how to download it, and turn you loose on the processor of your choice. page 3 – 18 VP-8IP / Sep 2013...
  • Page 75 Selectable Meter ....................4-16 AES And TX Output Meters ................4-17 60dB Range ......................4-17 Display Signal Selection ..................4-17 Input .........................4-17 PreDelay ......................4-17 Audio ........................4-18 Gain Reduction ....................4-18 Controls ......................4-18 L/R (Left/Right) ....................4-18 O-Scope ......................4-18 page 4 – 1 VP-8IP / Sep 2013...

  • Page 76: Ip Pro Gui

    Pro GUI Access ....................4-35 Pro GUI Lock ....................4-35 Status Indicators ....................4-36 Events .......................4-37 Creating a Weekly Rotation Event ..............4-37 Creating a Long Term Rotation Event ............4-38 Deleting a Scheduled Event ...............4-38 Set Time ......................4-39 page 4 – 2 VP-8IP / Sep 2013...
  • Page 77 Status ........................4-43 Devices .........................4-43 Presets .........................4-44 Notes on Online and Offline Working ..............4-45 Accessing Menu Options ..................4-46 File Menu Items ....................4-46 Hardware Menu Items ..................4-46 VP‑8 Hardware Update .................4-47 Presets Menu Items ....................4-49 page 4 – 3 VP-8IP / Sep 2013...

  • Page 78: Architecture Of The Vp-8 Ip Pro Gui

    Windows navigation techniques is assumed. If terms such as “left-click,” “right-click,” “ double-click,” and “drag-and-drop” seem alien, operating the VP‑8 ’s Windows-based GUI’s could be a bit problematic. page 4 – 4 VP-8IP / Sep 2013...

  • Page 79: Ip And The Pro Gui

    ’s IP address will not be changed! Start the VP‑8 Pro GUI software. Then right click on the control area of the Pro GUI and select Hardware/Assign IP Address. The following window will appear: Figure 1 page 4 – 5 VP-8IP / Sep 2013...
  • Page 80 (please see the bottom of the image at right). When this occurs the VP‑8 has been programmed with its new IP address and is ready for use. page 4 – 6 VP-8IP / Sep 2013...

  • Page 81: Adding Devices

    When this is done, the following window will pop up: Next, click the Add button and the Edit Device dialog box will appear. This box is used for adding new devices or modifying the configuration of existing ones. page 4 – 7 VP-8IP / Sep 2013...
  • Page 82 Pro GUI retries the establish- ment of a connection. Under these circumstances the configuration of the Pro GUI and VP‑8 should be carefully examined to ensure that the destination TCP/IP address is consistent between the two. page 4 – 8 VP-8IP / Sep 2013...

  • Page 83: Connecting Directly Without A Lan

    Be aware that a fairly high quality connection is required in order to have full advantage of the real-time graphics displays on the remote Pro GUI. Low speed connections will still function, but graphics performance, especially when displaying FFT information, may be degraded. page 4 – 9 VP-8IP / Sep 2013...

  • Page 84: The Really Remote Connection

    Sometimes the local network warrants the Subnet and Gateway values to be vastly different, but our suggested starting values of 255.255.255.0 for the Subnet and 255.255.255.255 for the Gateway should suffice for all but the most complex situations. page 4 – 10 VP-8IP / Sep 2013...

  • Page 85: About Ports And The Vp-8 Ip

    The system menu provides an option to use the TCP Protocol for metering data. This option can be used when the network path between the VP‑8 and Host PC is blocking UDP traffic. page 4 – 11 VP-8IP / Sep 2013...

  • Page 86: Using The Vp-8 Ip Pro Gui

    – the Dynamic Displays – and then we’ll explain the Control Area above it, followed by the Side Bar buttons, and lastly the Title Bar. TITLE BAR TABS DYNAMIC DISPLAYS page 4 – 12 VP-8IP / Sep 2013...

  • Page 87: Dynamic Displays Region

    The display range of the display may be changed by dragging the right-hand scale up or down as desired. page 4 – 13 VP-8IP / Sep 2013...

  • Page 88: Ip Graphical Interface Operation

    Parameters within each of the processing sections can be accessed by clicking on the associated tab at the top of the screen. By right clicking on the graphical display area with your mouse the following options will appear: page 4 – 14 VP-8IP / Sep 2013...

  • Page 89: First, A Short Tutorial

    Flatten in order to turn them off. When you finally click Flatten the line will return back to flat and you may move it up and down again with the mouse, this time as a whole. page 4 – 15 VP-8IP / Sep 2013...

  • Page 90: Bargraph Metering

    Control Area Region by selecting Context from the list. page 4 – 16 VP-8IP / Sep 2013...

  • Page 91: Aes And Tx Output Meters

    “Handbook for Sound Engineers” by Glen Ballou and published by the Howard W. Sams Company (ISBN 0-672-21983-2). PreDelay Pressing this button enables the viewing of the output of the FM processing chain prior to the diversity delay. page 4 – 17 VP-8IP / Sep 2013...

  • Page 92: Audio

    When this box is checked and the Audio box is also checked, an oscilloscope-like display of the audio waveform is displayed. Which waveform is being displayed at any instant is a function of the selection made under the Audio section explained above. page 4 – 18 VP-8IP / Sep 2013...

  • Page 93: Control Area Region

    A small green indicator at the left end of each button indicates if any signal processing within that block is active. Left-clicking a button opens the associated control panel to gain access to the controls for that block of signal-processing. page 4 – 19 VP-8IP / Sep 2013...

  • Page 94: Input Menu

    ‑48dBFS if the input was WNIP. • If the primary audio source was analog, then a silence sense timeout of 30 seconds must elapse with audio below ‑48dBFS before failover to the digital inputs will occur. page 4 – 20 VP-8IP / Sep 2013...

  • Page 95: Analog Gain

    No information is lost and no harmonic or intermodulation distortion is created by the Phase Rotator process. Only the signal’s harmonic phase relationships are rearranged to make the waveform energy more uniform in polarity. page 4 – 21 VP-8IP / Sep 2013...

  • Page 96: Hpf - High Pass Filter

    A good starting setting when using Stereo mode is 30Hz. Good starting settings when using Sum/Diff mode is 30Hz for Sum and 180Hz for Diff. Both HPF controls operate over a range of 20Hz to 300Hz. page 4 – 22 VP-8IP / Sep 2013...

  • Page 97: Parametric Equalizer Menu

    As the controls are manipulated, numerical representations of the control settings appear in the boxes below the band that is being adjusted. page 4 – 23 VP-8IP / Sep 2013...

  • Page 98: Eq Master Enable

    This is the master Equalizer In/Out button. When it is illuminated, the equalizer section is in, even if no other section of the equalizer has been enabled by clicking the LOW, MID 1, MID 2, or HIGH buttons. page 4 – 24 VP-8IP / Sep 2013...

  • Page 99: Automatic Gain Control And Compressor Menu

    “made up” afterwards in order to return it to a normal level. This is why the AGC Output control has such a wide range. page 4 – 25 VP-8IP / Sep 2013...

  • Page 100: Stereo Enhancement

    Compressor In / AGC In – Signal is being routed through the AGC and Compressor, which together operate with different time constants. The sound of the processing will be quite smooth with both short and long term variations in level being corrected (also see AGC Backoff). page 4 – 26 VP-8IP / Sep 2013...

  • Page 101: Gating And Agc Backoff

    Slow Recovery is determined by the setting of the Gating Delay control. The controls associated with the Gate algorithm are quite subjective and therefore should be adjusted entirely by the requirements of the program format. There is no right page 4 – 27 VP-8IP / Sep 2013...

  • Page 102: Interband Coupling

    AGC and compressors. If for some reason less AGC control signal is desired, it may be achieved by lengthening the AGC attack time to large or very large values. page 4 – 28 VP-8IP / Sep 2013...

  • Page 103: Crossover Frequencies

    Further tailoring of the sound of the midrange may be achieved by skewing the Low Mid to High Mid crossover in one direction or another until the proper sound texture is achieved. page 4 – 29 VP-8IP / Sep 2013...

  • Page 104: Agc/Compressor Gain Reduction

    The blue line depicts the gain reduction occurring in the slower AGC, while the yellow line depicts gain reduction in the faster Compressor section. page 4 – 30 VP-8IP / Sep 2013...

  • Page 105: System Menu

    From the Stereo Encoder Screen when in FM Mode: Pilot Pilot Phase BS412 SCA 1 SCA 2 TX 1 TX 2 Pilot Only Analog - L/R, L/R Deemph, and MPX output style choices baseband192 page 4 – 31 VP-8IP / Sep 2013...

  • Page 106: Metering Data Over Tcp/Ip

    In the upper left corner of that screen is a check box Metering data over TCP/IP. When the box is checked the TCP protocol is used for transmitting metering data instead of UDP. page 4 – 32 VP-8IP / Sep 2013...

  • Page 107: Headphone Source

    Pro GUI; no reboot of the unit is required. For a detailed description of the Process Modes see the next chapter. page 4 – 33 VP-8IP / Sep 2013...

  • Page 108: Remote Login

    Disable Front Panel choice in the Front Panel Password dialog. Note that locking out the front panel does not disable the ability of the encoder knob to alter the headphone volume. page 4 – 34 VP-8IP / Sep 2013...

  • Page 109: Pro Gui Access

    HARDWARE IP address (you can use the command prompt PING command to make sure that your computer can see the VP‑8 ). DO NOT PROCEED if you do not have network connectivity to the VP‑8 page 4 – 35 VP-8IP / Sep 2013...

  • Page 110: Status Indicators

    ‑48dBFS. When the indicator is red it means that valid digital audio data is not presently being detected, audio data could be present but is corrupted in some way, or that audio is present but is too low. page 4 – 36 VP-8IP / Sep 2013...

  • Page 111: Events

    1. Click the Add button in the Weekly Rotation area of the Event Scheduler window. The Weekly Rotation window will open as shown below. 2. On the left column, select the days that the preset should be selected. Any combination of check boxes may be chosen. page 4 – 37 VP-8IP / Sep 2013...

  • Page 112: Creating A Long Term Rotation Event

    Event Scheduler window. The highlighted scheduled event will be removed from the list. Note that there is no confirmation prior to the actual deletion of the event! page 4 – 38 VP-8IP / Sep 2013...

  • Page 113: Set Time

    (SNTP, or Simple Network Time Protocol) if desired. Alternately, time can be synchronized to the PC that is running the Windows-based GUI. In this instance time updates will occur upon successful connection to the GUI on the remote PC. page 4 – 39 VP-8IP / Sep 2013...

  • Page 114: Side Bar Region

    Needless to say, this erases, as in loses, as in destroys, the overwritten preset’s contents. Factory presets are protected from being inadvertently overwritten. page 4 – 40 VP-8IP / Sep 2013...

  • Page 115: Library

    Add brings up the Edit Device dialog box, which asks for the new prospect’s name and IP address. page 4 – 41 VP-8IP / Sep 2013...

  • Page 116: Quick Save (Qsave)

    • When you are pleased with one set of settings and need more buffers for further tweaking, you can use the A=B/B=A button to make the two buffers the same and have one of them to use to start comparing from again. page 4 – 42 VP-8IP / Sep 2013...

  • Page 117: Title Bar Region

    Add brings up the Edit Device dialog box, which asks for the new prospect’s name and IP address. page 4 – 43 VP-8IP / Sep 2013...

  • Page 118: Presets

    Pro GUI’s mirror archive; red indicates a discrepancy. Double-clicking on the name brings up a Preset Difference – parameter- by-parameter, setting-by-setting – comparison list between the current VP‑8 settings and the recalled preset. page 4 – 44 VP-8IP / Sep 2013...

  • Page 119: Notes On Online And Offline Working

    • Offline – The double-clicked preset brings that preset onto the main control and display screen for perusa /editing. Any data entry / control which involves activity within the main graph will still operate upon the preset, but not on the VP‑8 ’s audio. page 4 – 45 VP-8IP / Sep 2013...

  • Page 120: Accessing Menu Options

    Login Password... – Opens the Passwords dialog box for editing login passwords. Front Panel Password... – Opens the Passwords dialog box for editing front panel access passwords. Version... – Displays the current software versions running in your VP‑8 hardware. page 4 – 46 VP-8IP / Sep 2013...

  • Page 121: Ip Hardware Update

    Processing website or located on the CDROM that you received from Wheatstone Technical Support. Verify that the version number is correct in that it matches the ver- sion number listed in the documentation about the firmware upgrade. If so, select the page 4 – 47 VP-8IP / Sep 2013...
  • Page 122 Dialog boxes similar to the following will pop up as the download progress occurs: When the process has finished, you will be prompted to reboot the VP‑8 by the prompt below: When the VP‑8 reboots the new VBN code will be running in the unit. page 4 – 48 VP-8IP / Sep 2013...

  • Page 123: Presets Menu Items

    VP‑8 Control Panel. Take... – Brings up the Take Preset dialog box. Save – Brings up the Save as Presets dialog box. Library... – Brings up the Preset Library dialog box. page 4 – 49 VP-8IP / Sep 2013...

  • Page 124: Ip Process Modes

    Look Ahead Limiter Enable ................5-20 L/R Linked ......................5-20 Lim/Clip (Limiter/Clipper) Drive ................5-20 Attack .......................5-21 Release ......................5-21 Delayed Release ....................5-21 Clip Style (Main Clipper) ...................5-21 Diversity Delay ......................5-22 Manually Entering Delay Value .................5-22 page 5 – 1 VP-8IP / Sep 2013...
  • Page 125 Threshold Screen .....................5-35 Attack Time Screen ..................5-36 Release Time Screen ..................5-37 Final Equalization Screen .................5-38 AM Look Ahead Limiter ..................5-39 AM Look Ahead Limiter Controls .................5-39 Look Ahead Limiter Enable ................5-39 L/R Linked ......................5-39 page 5 – 2 VP-8IP / Sep 2013...
  • Page 126 Release Time Screen ..................5-55 Final Equalization Screen .................5-56 FM-HD Menu ......................5-57 FM-HD Look Ahead Limiter ..................5-57 FM-HD Look Ahead Limiter Controls ..............5-58 Look-ahead Limiter Enable ................5-58 Left/Right Linked ....................5-58 Lim (Limiter) Drive .....................5-58 page 5 – 3 VP-8IP / Sep 2013...
  • Page 127 AM-HD Look Ahead Limiter Controls ..............5-71 Look-ahead Limiter Enable ................5-71 L/R Linked ......................5-71 Lim (Limiter) Drive .....................5-71 Attack .......................5-71 Release ......................5-72 Delayed Release ....................5-72 Phase Reverse .....................5-73 Left Right Reverse ....................5-73 Analog ........................5-73 Digital Output .......................5-73 page 5 – 4 VP-8IP / Sep 2013...
  • Page 128 Multiband Enable ....................5-90 Multiband Drive ....................5-90 Multiband Knee ....................5-90 MP3/ACC Bass Tools ......................5-91 <48 Drive .........................5-92 Style ........................5-92 Frequency ......................5-92 Output ......................5-93 Multiband Limiter Adjustments ................5-94 Threshold Screen .....................5-94 Attack Time Screen ..................5-95 page 5 – 5 VP-8IP / Sep 2013...
  • Page 129 MP3/AAC<48K Look Ahead Limiter Controls .............5-102 Look-ahead Limiter Enable ................5-102 Lim (Limiter) Drive ....................5-102 Attack ......................5-103 Release ......................5-104 Delayed Release ....................5-105 Mono Output .......................5-105 Phase ........................5-105 Left Right Reverse ....................5-105 Analog .........................5-106 Digital Output ......................5-106 page 5 – 6 VP-8IP / Sep 2013...

  • Page 130: Introduction

    FM in order to run that preset. In the System screen of the VP‑8 Guru and Pro GUI’s are the mode selection buttons. page 5 – 7 VP-8IP / Sep 2013...

  • Page 131: Fm Mode Summary

    MP3/AAC<48k modes assume that the user may not always know what codec(s) are being used during transmission of his audio; however he may at least know what bitrate the codec is utilizing. page 5 – 8 VP-8IP / Sep 2013...

  • Page 132: Audio Processor Tuning For Codecs

    The same holds true in general terms for a very general comparison between the MPEG-4 / AAC-LD codec. Note also that the HE-AAC codec is also sometimes referred to as aacPlus and AAC+. page 5 – 9 VP-8IP / Sep 2013...

  • Page 133: Processing Common To All Modes

    NOTE: VORSiS VP‑8 PROCESS MODES The balloon at the upper right on the following pages clearly indicates the processing mode described on that page. page 5 – 10 VP-8IP / Sep 2013 page 5 – 10 VP-8IP / Sep 2013...

  • Page 134: Ip Fm Process Mode

    In fact the Bass Tools is the reason why we can recommend longer limiter attack times at low frequencies – the Bass Tools will manage the (intentional) limiter overshoots caused by lengthening the bass attack times in an artistic way. page 5 – 11 VP-8IP / Sep 2013...

  • Page 135: Multiband Enable

    The sound of this setting is more open and free because no limiting activity occurs until the threshold is achieved. However, once above threshold the audio levels cannot increase. page 5 – 12 VP-8IP / Sep 2013...

  • Page 136: Bass Tools

    Furthermore, the ability to utilize the Bass Tools on both the FM and HD sides of the processor allows the sound to be more evenly matched as receiver-based digital to analog crossfades are encountered. page 5 – 13 VP-8IP / Sep 2013...

  • Page 137: Drive

    Comparison of Bass Tools Operating Modes Frequency The Freq control is simple. All audio below the frequency selected is processed by Bass Tools. Smoother bass can be had with settings above 200Hz, which is recommended. page 5 – 14 VP-8IP / Sep 2013...

  • Page 138: Output

    Entirely different sound textures may be created by placing the pre-emphasis in one location versus the other. There is no right or wrong setting unless that setting does not produce the on air sound desired. page 5 – 15 VP-8IP / Sep 2013...

  • Page 139: Multiband Limiter Adjustments

    Note: Radically different settings between adjacent bands won’t cause strange sounds – there is no swishing in the Vorsis multiband limiter algorithm. Operationally, though, it doesn’t make much sense. page 5 – 16 VP-8IP / Sep 2013...

  • Page 140: Attack Time Screen

    Generally, lower frequencies require slower attack times and higher frequencies require faster attack times for a given amount of control. The attack times of each band may be individually or collectively modified using the GUI operating instructions provided earlier. page 5 – 17 VP-8IP / Sep 2013...

  • Page 141: Release Time Screen

    Release times should be adjusted to taste, keeping in mind that the slower the release time the more dynamic the sound, but the more likely that audible ducking may be heard. page 5 – 18 VP-8IP / Sep 2013...

  • Page 142: Final Equalization Screen

    On the other hand, equalization cuts can be made as desired because they do not add energy. page 5 – 19 VP-8IP / Sep 2013...

  • Page 143: Fm Look Ahead Limiter

    This controls the amount of drive to the following distortion-controlled clipper and/or look ahead limiter, as chosen. The gain range of this control is +12dB/-18dB. The resolution of this control is 0.01dB, fine enough for the most exacting drive level adjustments. page 5 – 20 VP-8IP / Sep 2013...

  • Page 144: Attack

    This is because increased limit- ing depth increases energy, which in turn can increase the duty cycle of any clipping that is occurring in the Main Clipper. page 5 – 21 VP-8IP / Sep 2013...

  • Page 145: Diversity Delay

    Ctrl key to achieve finer control. When the Delay controls are both set to their minimum settings, OFF appears in the delay window to signal that there is no delay at all in the circuit. page 5 – 22 VP-8IP / Sep 2013...

  • Page 146: Fm Stereo Encoder Menu

    There are eleven operational choices available under the Stereo Width Limiter control settings: 10% to 100% in 10% percent steps, and an Off setting. Off is the setting immediately above the setting for 100%. page 5 – 23 VP-8IP / Sep 2013...

  • Page 147: Operating The Bs-412 Mpx Power Controller

    Once again … If your station is not required to comply with a Multiplex Power standard where it is licensed to operate the BS‑412 control should remain in its OFF position! page 5 – 24 VP-8IP / Sep 2013...

  • Page 148: Mpx Lim/Clip (Limiter/Clipper) Drive

    Oscillator check box is selected. There is included a special frequency, Bessel, which is a 31.250kHz test signal that can be used when the first Bessel null is being utilized for modulation monitor calibration. page 5 – 25 VP-8IP / Sep 2013...

  • Page 149: Multiplex Process

    VBMS section because such harmonics are required in order to make the waveform have a tightly defined peak amplitude. page 5 – 26 VP-8IP / Sep 2013...

  • Page 150: Stereo Encoder

    When the Stereo Encoder is operated in one of the two L/R modes a single Analog Output control appears which adjusts both the left and right channel output amplitudes simultaneously. This control can be set to OFF or to levels from -79.95dB to 0.00dB in 0.05dB steps. page 5 – 27 VP-8IP / Sep 2013...

  • Page 151: Pilot Only

    L/R case above, the XLR outputs are electronically balanced. These balanced outputs can be used to gain a signal to noise advantage with exciters having a balanced composite input (most modern ones do). page 5 – 28 VP-8IP / Sep 2013...
  • Page 152 -80dB to 0dB (6dB in MPX mode) in 0.05dB steps, covering virtually every conceivable operating need in the field. NOTE: A 0dB setting of the output level controls results in a +22dBu PEAK output level at the balanced outputs! page 5 – 29 VP-8IP / Sep 2013...

  • Page 153: Ip Am Process Mode

    Analog 1 LF Tilt L 0.0dB Analog 2 Level -14dB (= +10dBu Peak) Analog 2 Phase Analog 2 LF Tilt F 20.0Hz Analog 2 LF Tilt Q 1.06 Analog 2 LF Tilt L 0.0dB page 5 – 30 VP-8IP / Sep 2013...

  • Page 154: Limiters Menu

    Very high Multiband Drive settings that result in more than 12-15dB of continuous gain reduction are typically unnecessary with most AM formats. page 5 – 31 VP-8IP / Sep 2013...

  • Page 155: Multiband Knee

    Because of its behavior, the sound of the Soft function is more obvious and has a “spongy” sound when in operation. It is also less precise as a true limiter until the ultimate limit threshold (the setting of the band threshold) is finally reached. page 5 – 32 VP-8IP / Sep 2013...

  • Page 156: Bass Tools

    Two Bass Tools operating styles, plus Off, are available. The Hard setting has a transfer function occupying approximately 1dB of transition amplitude. The waveform control is fairly abrupt and generates low order harmonics. page 5 – 33 VP-8IP / Sep 2013...

  • Page 157: Frequency

    Note that in our AM presets we use a combination of the NRSC pre-emphasis in the AM Limiter screen and parametric equalization prior to the four band AGC to create satisfactory subjective brightness and intelligibility on an average AM receiver. page 5 – 34 VP-8IP / Sep 2013...

  • Page 158: Multiband Limiter Adjustments

    5 – 35 VP-8IP / Sep 2013...

  • Page 159: Attack Time Screen

    Generally, lower frequencies require slower attack times and higher frequencies require faster attack times for a given amount of control. The attack times of each band may be individually or collectively modified using the GUI operating instructions provided earlier. page 5 – 36 VP-8IP / Sep 2013...

  • Page 160: Release Time Screen

    Release times should be adjusted to taste, keeping in mind that the slower the release time the more dynamic the sound, but the more likely that audible ducking may be heard. page 5 – 37 VP-8IP / Sep 2013...

  • Page 161: Final Equalization Screen

    On the other hand, equalization cuts can be made as desired because they do not add energy. page 5 – 38 VP-8IP / Sep 2013...

  • Page 162: Am Look Ahead Limiter

    When this box is checked the look ahead limiter’s left and right channel control signals are common. This prevents unnatural stereo image shifts when one channel needs to reduce the signal in order to control peak excursions. page 5 – 39 VP-8IP / Sep 2013...

  • Page 163: Final Lim/Clip (Limiter/Clipper) Drive

    Final Lim/Clip Drive control and the amount of activity occurring in the eight band limiter section. This is because increased limiting depth increases energy, which in turn can increase the duration of clipping occurring in the Main Clipper. page 5 – 40 VP-8IP / Sep 2013...

  • Page 164: Diversity Delay

    This is useful when you know roughly how much delay is required or wish to try various values quickly. You may also hold down the Shift key on your page 5 – 41 VP-8IP / Sep 2013...
  • Page 165 Ctrl key to achieve finer control. If entering a delay time manually keep in mind that the text box expects the manual input to be in milliseconds, so a delay of 8.3488 seconds would be entered as “8348.8.” page 5 – 42 VP-8IP / Sep 2013...

  • Page 166: Am Transmission Menu

    CCIR specifications. 6.5K: Restricts the output spectrum to 6.5 kHz. 7.5K: Restricts the output spectrum to 7.5 kHz. 10K NRSC: Restricts the output spectrum to 10 kHz as required by the NRSC-1 specification. page 5 – 43 VP-8IP / Sep 2013...

  • Page 167: Output Mode

    AM transmitters require approximately +10dBu for 100% modulation which leaves plenty of headroom. Peak Polarity If you observe that the negative modulation increases as you advance the Positive Modulation control above 100% the output polarity between the VP‑8 and the transmitter page 5 – 44 VP-8IP / Sep 2013...

  • Page 168: Output Level Setting

    LF Tilt Correction is designed to pre-distort the shape of the waveform generated by the processor in order to make it “complimentary” to what the transmitter will do to the waveform later. In essence, LF Tilt Correction is a specialized, extremely low frequency page 5 – 45 VP-8IP / Sep 2013...

  • Page 169: Adjusting The Tilt Corrector

    RF waveform. It should appear like waveform A or waveform B below, or somewhere in between the two extremes, depending on the response flatness of the transmitter’s low frequency performance. page 5 – 46 VP-8IP / Sep 2013...

  • Page 170: Digital Output

    200% positive modulation before its digital section “runs out of bits.” De-Emphasis When checked, applies complimentary de-emphasis to the AES3 digital output. PreDelay When checked, the AES Output signal is taken before the Diversity Delay. page 5 – 47 VP-8IP / Sep 2013...

  • Page 171: Ip Fm-Hd Process Mode

    We recommend operating the limiters in a manner that allows them to­do­three­things:­gently­increase­RMS­energy­(loudness),­shape­the­HF­spectrum­to­ make it more suitable for the FM-HD medium, and control longer duration transients that­the­preceding­four­band­AGC/compressor­intentionally­misses­in­order­to­keep­ the processor sounding musical. Therefore­for­best­musicality­we­recommend­that­the­limiters­not­be­operated­with­ extremely­short­attack­and­release­times.­The­reasoning­behind­this­is­twofold: 1. Extremely­short­attack­times,­while­affording­virtually­perfect­peak­control,­remove­ so­much­transient­energy­as­to­make­the­sound­too­homogenized­and­lifeless. 2.­Even­though­our­limiters­have­delayed­release­built,­in­extremely­short­release­ times­may­increase­certain­coding­artifacts.­This­is­because­the­codec­will­see­the­ page 5 – 48 VP-8IP / Sep 2013...

  • Page 172: Multiband Enable

    In the Hard mode, limiting action does not occur until the threshold within a particular band is precisely reached. The sound of this setting is more open and free because no limiting activity occurs until the threshold is achieved. page 5 – 49 VP-8IP / Sep 2013...

  • Page 173: Bass Tools

    ­ s urprisingly­ revealed­ that­ it­ is­ perfectly­ acceptable­ to­ process­ very­ low­ frequency­ material­using­the­Bass­Tools­algorithm­provided­that­the­harmonics­generated­­ d uring­ the­ process­ are­ well­ controlled­ spectrally.­ Since­ our­ bass­ algorithm­ does­ not­ allow­ ­ s ignificant­harmonic­levels­above­the­third­or­fifth­(somewhat­dependent­the­Bass­Tools­ Style­setting)­there­is­no­audible­downside­to­using­it­with­coded­audio.­Furthermore,­ the­ability­to­utilize­the­Bass­Tools­on­both­the­FM­and­HD­sides­of­the­processor­allows­ the­sound­to­be­more­evenly­matched­as­receiver-based­digital­to­analog­crossfades­ are encountered. page 5 – 50 VP-8IP / Sep 2013...

  • Page 174: Drive

    When Off is selected, the Bass Tools processing is bypassed. Frequency The Freq control is simple. All audio below the frequency selected is processed by Bass Tools. Smoother bass can be had with settings above 200Hz, which is recommended. page 5 – 51 VP-8IP / Sep 2013...

  • Page 175: Output

    -6.0dB reduce it. Both the Bass Tools Drive and the Output controls are best adjusted by ear using percussive bass material. The Output control is adjustable between -12dB and 0dB. page 5 – 52 VP-8IP / Sep 2013...

  • Page 176: Multiband Limiter Adjustments

    VP‑8 Graphical Interface Operation section. Lower­settings­(more­negative­numbers)­reduce­the­threshold,­causing­limiting­to­ occur­at­lower­audio­levels.­Conversely,­higher­thresholds­cause­limiting­to­occur­at­ higher audio levels. Note:­ Radically­ different­ settings­ between­ adjacent­ bands­ won’t­ cause­ strange­ sounds – there is no swishing in the Vorsis multiband limiter algorithm. page 5 – 53 VP-8IP / Sep 2013...

  • Page 177: Attack Time Screen

    The­attack­times­of­each­band­may­be­individually­or­collectively­modified­using­ the­GUI­operating­instructions­provided­earlier. “When it comes to adjusting an audio processor there are really no right or wrong settings - what sounds right and works right in the specific application is right!” page 5 – 54 VP-8IP / Sep 2013...

  • Page 178: Release Time Screen

    Multiband Limiter Release Time Screen The release time of a limiter determines how fast it recovers from an audio peak that has­caused­a­momentary­decrease­in­gain.­Shorter­release­times­create­a­more­dense­ sound,­and­excessively­short­release­times­might­increase­intermodulation­distortion­ (the­mixing­of­low­and­high­frequency­energy­–­or­a­muddying­of­the­sound).­The­ multiband­limiters­all­have­Delayed­Release­timing­built­in­to­minimize­unintentional­ intermodulation distortion. The­release­times­for­each­band­are­adjustable­from­300­milliseconds­down­to­ 3­milliseconds.­Faster­release­allows­a­more­rapid­recovery­after­a­limiting­event,­ while­slower­release­times­do­the­opposite.­Release­times­should­be­adjusted­to­taste,­ keeping­in­mind­that­the­slower­the­release­time­the­more­dynamic­the­sound,­but­the­ more­likely­that­audible­ducking­may­be­heard. page 5 – 55 VP-8IP / Sep 2013...

  • Page 179: Final Equalization Screen

    In­ fact,­ the­ adjustment­ range­has­been­limited­to­+3dB/-12dB­in­order­to­curtail­the­temptation­to­perform­ ­ a ggressive­equalization­where­it­is­the­most­inappropriate.­Even­this­range­is­quite­ large considering the effect that can be created. Small­adjustments­in­EQ­boost­–­on­the­order­of­1dB­or­2dB­at­most­–­are­sufficient­ to­alter­the­overall­tonality­of­the­eight­band­section.­­ Equalization­ boosts­ are­ always­ approached­ with­ caution­ because­ they­ can­ add­ significant­energy­that­must­be­controlled­later­by­the­look­ahead­limiter­(or­clippers).­ On­the­other­hand,­equalization­cuts­can­be­made­as­desired­because­they­remove, not add,­energy. page 5 – 56 VP-8IP / Sep 2013...

  • Page 180: Fm-Hd Menu

    By­sampling­the­audio­waveform­with­finer­resolution,­peaks­that­would­be­missed­ because­they­would­fall­“between­the­samples”­can­be­reliably­detected.­Note­that­if­ both the audio and control signals were oversampled, peaks would be missed again because their relative time alignment would be identical to the non-oversampled case! page 5 – 57 VP-8IP / Sep 2013...

  • Page 181: Fm-Hd Look Ahead Limiter Controls

    How the attack time is adjusted­is­always­a­tradeoff­between­the­accuracy­of­peak­control­and­the­musicality­ of­the­processor,­with­attack­time­settings­above­approximately­6­milliseconds­being­ far­more­musical­(in­our­opinion)­than­those­settings­below­6­milliseconds. Release Time Controls­the­primary­(fast)­release­time­of­the­look­ahead­limiter.­ Slower­settings­(longer­release­times)­cause­the­peak­limiter­to­recover­more­slowly­ from­limiting;­release­times­that­are­set­too­slow­may­allow­undesirable­signal­ducking­ to occur because the audio level remains reduced too long after a peak limiting event. Conversely,­fast­release­times­increase­signal­density,­but­release­times­that­are­too­ fast­may­result­in­increased­intermodulation­distortion­that­can­“muddy”­the­sound.­ When­processing­for­a­perceptual­codec­we­recommend­release­times­no­faster­than­50­ milliseconds­in­order­to­minimize­the­generation­(and­coding)­of­close-in­difference­ frequency­intermodulation­components­that­can­result­­from­very­fast­release­times. The­overall­range­of­the­control­is­from­33­milliseconds­to­330­milliseconds­with­an­ ideal­setting­for­most­applications­falling­between­70­and­130­milliseconds. page 5 – 58 VP-8IP / Sep 2013...

  • Page 182: Delayed Release

    Controls the output amplitude of the analog output signal appearing on the left and­right­channel­XLR’s­on­the­rear­panel.­This­control­can­be­set­to­OFF­or­to­levels­ from­-79.95dB­(or­-57.95dBu)­to­0.00dB­(or­+24.0dBu)­in­0.05dB­steps. Digital Output Adjusts the peak­audio­signal­level­present­at­the­AES/EBU­digital­output.­The­ resulting­ output­ levels­ are­ simultaneously­ indicated­ in­ dBFS­ by­ the­ front­ panel­ and­remote­GUI­bargraph­meters.­This­Digital Output control can be set to OFF or adjusted­over­the­range­of­minus­35.95dBFS­to­0.00dBFS.­ page 5 – 59 VP-8IP / Sep 2013...

  • Page 183: Ip Am-Hd Process Mode

    AM-HD medium, and control longer duration transients that the­preceding­four­band­AGC/compressor­intentionally­misses­in­order­to­keep­the­ processor sounding musical. Therefore­ for­ best­ musicality­ we­ recommend­ that­ the­ limiters­ not­ be­ operated­ with­extremely­short­attack­and­release­times.­The­reasoning­behind­this­is­twofold: 1.­Extremely­short­attack­times,­while­affording­virtually­perfect­peak­control,­remove­ so­much­transient­energy­as­to­make­the­sound­too­homogenized­and­lifeless. page 5 – 60 VP-8IP / Sep 2013...

  • Page 184: Multiband Enable

    The graphic below illustrates the difference between the two transfer functions. In­the­Hard mode, limiting action does not occur until the threshold within a particular band­is­precisely­reached.­The­sound­of­this­setting­is­more­open­and­“free”­because­no­ limiting­activity­occurs­until the threshold is achieved. page 5 – 61 VP-8IP / Sep 2013...

  • Page 185: Bass Tools

    Furthermore, the ability to utilize the Bass Tools on both the FM and HD sides of the processor allows the sound to be more evenly matched as receiver-based digital to analog crossfades are encountered. page 5 – 62 VP-8IP / Sep 2013...

  • Page 186: Drive

    When Off is selected, the Bass Tools processing is bypassed. Frequency The Freq control is simple. All audio below the frequency selected is processed by Bass Tools. Smoother bass can be had with settings above 200Hz, which is recommended. page 5 – 63 VP-8IP / Sep 2013...

  • Page 187: Output

    -6.0dB reduce it. Both the Bass Tools Drive and the Output controls are best adjusted by ear using percussive bass material. The Output control is adjustable between -12dB and 0dB. page 5 – 64 VP-8IP / Sep 2013...

  • Page 188: Multiband Limiter Adjustments

    VP‑8 Graphical Interface Operation section. Lower­settings­(more­negative­numbers)­reduce­the­threshold,­causing­limiting­to­occur­ at­lower­audio­levels.­Conversely,­higher­thresholds­cause­limiting­to­occur­at­higher­ audio levels. Note:­ Radically­ different­ settings­ between­ adjacent­ bands­ won’t­ cause­ strange­ sounds – there is no swishing in the Vorsis multiband limiter algorithm. page 5 – 65 VP-8IP / Sep 2013...

  • Page 189: Attack Time Screen

    Attack­times­are­generally­adjusted­to­taste,­keeping­in­mind­that­the­slower­the­ attack­time­the­more­work­the­limiter­must­do,­while­conversely­the­faster­the­attack­ time­the­fewer­short­term­dynamics­the­program­material­will­have. Generally,­lower­frequencies­require­slower­attack­times­and­higher­frequencies­ require faster attack times for a given amount of control, though this statement is not,­nor­should­it­even­be,­“written­in­stone.”­When­it­comes­to­setting­up­an­audio­ ­ p rocessor­there­is­really­no­right­or­wrong­setting­–­what­sounds right and works right in­the­specific­application­is right! The­attack­times­of­each­band­may­be­individually­or­collectively­modified­using­ the­GUI­operating­instructions­provided­earlier. page 5 – 66 VP-8IP / Sep 2013...

  • Page 190: Release Time Screen

    The­ release­ times­ for­ each­ band­ are­ adjustable­ from­ 300­ milliseconds­ down­ to­ 3­ milliseconds.­ Faster­ release­ allows­ a­ more­ rapid­ recovery­ after­ a­ limiting­ event,­ while­slower­release­times­do­the­opposite.­Release­times­should­be­adjusted­to­taste,­ keeping­in­mind­that­the­slower­the­release­time­the­more­dynamic­the­sound,­but­the­ more­likely­that­audible­ducking­may­be­heard. page 5 – 67 VP-8IP / Sep 2013...

  • Page 191: Final Equalization Screen

    Only­very­small amounts of boost­equalization­are­recommended­once­final­limiting­ has­been­accomplished­in­the­eight­band­section.­In­fact,­the­adjustment­range­has­been­ limited­to­+3dB/-12dB­in­order­to­curtail­the­temptation­to­perform­aggressive­­ e qualization­ where it is the most inappropriate, and even this range is quite large considering the effect that can be created. Small­adjustments­in­EQ­boost­–­on­the­order­of­1dB­or­2dB­at­most­–­are­sufficient­ to­alter­the­overall­tonality­of­the­eight­band­section.­­ Equalization­boosts­are­approached­with­caution­because­they­can­add­significant­ energy­that­must­be­controlled­later­by­the­look­ahead­limiter­(or­clippers).­ On­the­other­hand,­equalization­cuts­can­be­made­as­desired­because­they­remove, not add,­energy. page 5 – 68 VP-8IP / Sep 2013...

  • Page 192: Am-Hd Menu

    There is no user-adjustable attack time for the HF Protect algorithm. This is because its reaction time­is­determined­automatically­by­evaluating­certain­characteristics­of­the­ input­program­energy­using­FFT­(Fast­Fourier­Transform)­analysis­before­the­energy­ actually­reaches­the­algorithm.­Because­of­the­complexity­and­critical­nature­of­this­ measurement, and its interaction with other aspects of the HF Protect algorithm, the reaction­time­is­a­complex­combination­of­factors­that­would­be­extremely­difficult­ to­control,­let­alone­optimize,­with­knobs,­and­therefore­it­has­not­been­made­field­ adjustable. page 5 – 69 VP-8IP / Sep 2013...

  • Page 193: Hf Recovery

    L-R material is anything but “good.” Hyper Mono will improve the overall sound quality by removing information that the codec should not be utilizing its fixed bit pool to encode. page 5 – 70 VP-8IP / Sep 2013...

  • Page 194: Am-Hd Look Ahead Limiter

    This prevents unnatural stereo image shifts when one channel needs to­reduce­the­signal­in­order­to­control­peak­excursions. Lim (Limiter) Drive This controls the amount of drive to the look ahead limiter. The gain range of this control­is­+12dB/-18dB.­The­resolution­of­this­control­is­0.01dB,­fine­enough­for­the­ most­exacting­output­level­adjustments. Attack This­control­adjusts­the­attack­time­of­the­look­ahead­limiter.­Because­the­look­ahead­ is­0.5mS,­an­attack­time­setting­of­0.2mS­creates­a­limiter­that­attacks­0.3mS­before­the­ peak­arrives­at­the­limiter’s­output­port.­Likewise,­a­setting­of­0.5mS­creates­a­limiter­ with­zero­attack­time­(because­the­look­ahead­is­0.5mS).­All­settings­above­0.5mS­create­ page 5 – 71 VP-8IP / Sep 2013...

  • Page 195: Release

    Use­of­the­Delayed­Release­mode­is­highly­recommended­when­processing­ahead­of­ a­perceptual­codec.­As­we­discussed­above,­very­fast­limiter­release­times­can­generate­ close-in­intermodulation­products­around­desirable­signals­and­this­may­degrade­the­ perceived­quality­of­the­audio­at­the­output­of­the­codec­more­than­just­the­action­of­ the­codec­or­limiters­themselves­would­imply. The Delayed Release­ control­ offers­ adjustments­ between­ 100­ milliseconds­ and­ 1.000­seconds.­We­cannot­recommend­a­Delayed Release­setting­below­approximately­ 160­milliseconds­when­processing­for­a­perceptual­codec.­ A n­ideal­setting­for­the­­ m ajority­ of­applications­will­fall­between­settings­of­300­and­600­milliseconds. page 5 – 72 VP-8IP / Sep 2013...

  • Page 196: Phase Reverse

    Controls the output amplitude of the analog output signal appearing on the left and right­channel­XLR­connectors­on­the­rear­panel.­This­output­control­can­be­set­to­OFF­ or­to­levels­from­-79.95dB­(or­-57.95dBu)­to­0.00dB­­ ( or­+24.0dBu)­in­0.05dB­steps. Digital Output Adjusts the peak audio signal level present at the VP‑8 ’s­AES/EBU­digital­output.­ The­resulting­output­levels­are­simultaneously­indicated­in­dBFS­by­the­front­panel­ and­remote­GUI­bargraph­meters.­This­control­can­be­set­to­OFF­or­adjusted­over­the­ range­of­minus­35.95dBFS­to­0.00dBFS.­ page 5 – 73 VP-8IP / Sep 2013...

  • Page 197: Ip Mp3/Aac>48K Process Mode

    This is because the codec will see the resulting intermodulation distortion as sidebands around a real signal frequency and, not knowing that it is not audio, code it along with the audio and reveal it as an unmasked artifact. page 5 – 74 VP-8IP / Sep 2013...

  • Page 198: Multiband Enable

    In the Hard mode, limiting action does not occur until the threshold within a particular band is precisely reached. The sound of this setting is more open and “free” because no limiting activity occurs until the threshold is achieved. page 5 – 75 VP-8IP / Sep 2013...

  • Page 199: Bass Tools

    Furthermore, the ability to utilize the Bass Tools on both the FM and HD sides of the processor allows the sound to be more evenly matched as receiver-based digital to analog crossfades are encountered. page 5 – 76 VP-8IP / Sep 2013...

  • Page 200: Drive

    Bass Tools processing is bypassed. Frequency The Freq control is simple. All audio below the frequency selected is processed by Bass Tools. Smoother bass can be had with settings above 200Hz, which is recommended. page 5 – 77 VP-8IP / Sep 2013...

  • Page 201: Output

    -6.0dB reduce it. Both the Bass Tools Drive and the Output controls are best adjusted by ear using percussive bass material. The Output control is adjustable between -12dB and 0dB. page 5 – 78 VP-8IP / Sep 2013...

  • Page 202: Multiband Limiter Adjustments

    Conversely, higher thresholds cause limiting to occur at higher audio levels. Note: Radically different settings between adjacent bands won’t cause strange sounds – there is no swishing in the Vorsis multiband limiter algorithm. page 5 – 79 VP-8IP / Sep 2013...

  • Page 203: Attack Time Screen

    The attack times of each band may be individually or collectively modified using the GUI operating instructions provided earlier (Chapter 4, page 4-15). page 5 – 80 VP-8IP / Sep 2013...

  • Page 204: Release Time Screen

    5 – 81 VP-8IP / Sep 2013...

  • Page 205: Final Equalization Screen

    Final Equalization Screen Because post limiter equalization is undesirable in a low-bitrate codec-based application there is no post limiter EQ available in the MP3/AAC>48K mode. page 5 – 82 VP-8IP / Sep 2013...

  • Page 206: The Vorsis Spectral Energy Gate

    Please be aware that results are strongly biased by the quality of the incoming program material, the pedigree of the encoder in use and, of course, the frailties of our human and ever present personal preferences. page 5 – 83 VP-8IP / Sep 2013...

  • Page 207: Mp3/Aac>48K Menu

    Oversampling of the audio signal itself is not only unnecessary, but wastes DSP resources. The graphic below illustrates why oversampling is more effective when the control signal is oversampled. page 5 – 84 VP-8IP / Sep 2013...

  • Page 208: Mp3/Aac>48K Look Ahead Limiter Controls

    0.5 milliseconds – an attack setting of 1.0 millisecond is actually an attack time of 0.5 milliseconds because of the 0.5 millisecond look ahead which is always active. page 5 – 85 VP-8IP / Sep 2013...
  • Page 209 5 – 86 VP-8IP / Sep 2013...

  • Page 210: Release

    180 degrees from the signal applied to the input of the VP‑8 . To change this setting merely click on it and its status will toggle. page 5 – 87 VP-8IP / Sep 2013...

  • Page 211: Left Right Reverse

    35.95dBFS to 0dBFS. Peak Output Level Note: As mentioned previously, the “peak level” accuracy of the output level controls is highly dependent on the setting of the Attack time of the Look Ahead Limiter. page 5 – 88 VP-8IP / Sep 2013...

  • Page 212: Ip Mp3/Aac<48K Process Mode

    2. Even though our limiters utilize a delayed release algorithm, extremely short release times may increase certain coding artifacts. This is because fast release page 5 – 89 VP-8IP / Sep 2013...

  • Page 213: Multiband Enable

    Each of the eight bands’ threshold and attack and release times is adjustable, as is the overall transfer function (knee hardness). The knee shape determines how the limiters behave near their thresholds of limiting. The graphic below illustrates the difference between the two transfer functions. page 5 – 90 VP-8IP / Sep 2013...

  • Page 214: Bass Tools

    Furthermore, the ability to utilize the Bass Tools on both the FM and HD sides of the processor allows the sound to be more evenly matched as receiver-based digital to analog crossfades are encountered. page 5 – 91 VP-8IP / Sep 2013...

  • Page 215: Drive

    Bass Tools processing is bypassed. Frequency The Freq control is simple. All audio below the frequency selected is processed by Bass Tools. Smoother bass can be had with settings above 200Hz, which is recommended. page 5 – 92 VP-8IP / Sep 2013...

  • Page 216: Output

    -6.0dB reduce it. Both the Bass Tools Drive and the Output controls are best adjusted by ear using percussive bass material. The Output control is adjustable between -12dB and 0dB. page 5 – 93 VP-8IP / Sep 2013...

  • Page 217: Multiband Limiter Adjustments

    Conversely, higher thresholds cause limiting to occur at higher audio levels. Note: Radically different settings between adjacent bands won’t cause strange sounds – there is no swishing possible in the Vorsis multiband limiter algorithm. page 5 – 94 VP-8IP / Sep 2013...

  • Page 218: Attack Time Screen

    The attack times of each band may be individually or collectively modified using the GUI operating instructions provided earlier (Chapter 4, page 4-15). page 5 – 95 VP-8IP / Sep 2013...

  • Page 219: Release Time Screen

    Release times should be adjusted to taste, keeping in mind that the slower the release time the more dynamic the sound, but the more likely that audible ducking may be heard. page 5 – 96 VP-8IP / Sep 2013...

  • Page 220: Final Equalization Screen

    Final Equalization Screen There is no post limiter EQ available in either the MP3/AAC<48K or MP3/AAC>48K modes. page 5 – 97 VP-8IP / Sep 2013...

  • Page 221: Mp3/Aac<48K Menu

    Dynamically decreasing the workload of the encoder in real time allows more bits to be available for coding the more prominent (and therefore more audible) audio data. The resulting audio quality is actually increased, which enhances the listening experience. page 5 – 98 VP-8IP / Sep 2013...

  • Page 222: Adaptive Bandwidth Controller™ Controls

    Low Pass Filter when set at each of its available cutoff frequencies. Note the steep low-pass character- istics and the perfect ruler-flat passband flatness at each filter setting. page 5 – 99 VP-8IP / Sep 2013...

  • Page 223: Codec Bitrate

    70mS. Therefore the correct setting will be 70mS + 30mS, or 100mS. The Codec Bitrate, Mask Thresh and Mask Recovery controls are always adjusted for the best subjective results at the output of the codec’s decoder. page 5 – 100 VP-8IP / Sep 2013...
  • Page 224 Please be aware that results are strongly biased by the quality of the incoming program material, the pedigree of the encoder in use and, of course, the frailties of our human and ever present personal preferences. page 5 – 101 VP-8IP / Sep 2013...

  • Page 225: Mp3/Aac<48K Look Ahead Limiter

    – all limiting must be done by the look ahead limiter. The gain range of this control is -18dB to+12dB. The resolution of this control is 0.01dB, fine enough for the most exacting drive adjustments. page 5 – 102 VP-8IP / Sep 2013...

  • Page 226: Attack

    The magnitude of these overshoots will be highly program dependent and will almost certainly be unpredictable. page 5 – 103 VP-8IP / Sep 2013...

  • Page 227: Release

    Delayed Release feature enabled, may result in some intermodulation distortion that can “muddy” the sound. When processing for a perceptual codec we page 5 – 104 VP-8IP / Sep 2013...

  • Page 228: Delayed Release

    When this check box is checked the left and right channels are swapped. If it is noticed that the left and right channels appear to be interchanged at the output of the VP‑8 please check this control first to ensure that it is not checked! page 5 – 105 VP-8IP / Sep 2013...

  • Page 229: Analog

    Peak Output Level Note: As mentioned previously, the “peak level” accuracy, that is, the calibration, of the output level controls is highly dependent on the setting of the Attack time of the Look Ahead Limiter. page 5 – 106 VP-8IP / Sep 2013...

  • Page 230: Appendix

    A P P E N D I X Appendix Contents Parameters, Units and Ranges .............A-2 page A – 1 VP-8IP / Sept 2013...

  • Page 231: Parameters, Units And Ranges

    Digital Fail Cause 2: Corrupted or invalid AES data Response Time: Immediate Audio Level Balance Type: Common to Analog and Digital inputs Analog/Digital L/R Balance Range: +/-12dB Analog/Digital L/R Balance Increments: 0.5dB page A – 2 VP-8IP / Sept 2013...
  • Page 232 Low Mid Band to High Mid Band: 250 Hz to 1.5 kHz High Mid Band to High Band: 3.0 kHz to 8.0 kHz Band Output Trims, Sum: +/- 6dB Band Output Trims, Difference: +/- 6dB page A – 3 VP-8IP / Sept 2013...
  • Page 233 0 – 20%, 0.1% steps Stereo Pilot Phase: +/- 22.5 degrees reference to 38kHz. SCA 1 Input: Analog, 10kohm input impedance, +24dBu max. input level SCA Input 1 Gain: -79.95dB to +10.00dB, or OFF page A – 4 VP-8IP / Sept 2013...
  • Page 234 Bass Tools Drive: - 6.0/+12.0dB Bass Tools Style: Soft/Hard Bass Tools Output: - 12.0/0.0dB Bass Tools Frequency: 60 - 300Hz Multiband Knee: Soft/Hard Multiband Threshold: +/-10dB relative to Drive Multiband Attack: 0.1ms – 100ms page A – 5 VP-8IP / Sept 2013...
  • Page 235 -79.95dB to +0.0dB, 0.05dB steps, or OFF Phase 0 or 180 degrees Analog 2: -79.95dB to +0.0dB, 0.05dB steps, or OFF Phase 0 or 180 degrees (Analog 2 is only available in MONO mode) page A – 6 VP-8IP / Sept 2013...
  • Page 236 100ms – 1000ms (1Sec) FM-HD Output Screen Controls Phase 0 or 180 degrees Left/Right Reverse checkbox Analog Out: -79.9dB to 0.0dB, 0.1dB steps, or OFF Digital Out: -35.95dB to 0.0dB, 0.05dB steps, or OFF page A – 7 VP-8IP / Sept 2013...
  • Page 237 Hyper Mono checkbox Recovery 33mS to 330mS Phase 0 or 180 degrees Left/Right Reverse checkbox Analog Out: -79.9dB to 0.0dB, 0.1dB steps, or OFF Digital Out: -35.95dB to 0.0dB, 0.05dB steps, or OFF page A – 8 VP-8IP / Sept 2013...
  • Page 238 Look Ahead Limiter Delayed Release: 100ms – 1000ms (1Sec) Phase 0 or 180 degrees Left/Right Reverse checkbox Analog Out: -79.95dB to 0.0dB, 0.05dB steps, or OFF Digital Out: -35.95dB to 0.0dB, 0.05dB steps, or OFF page A – 9 VP-8IP / Sept 2013...
  • Page 239 Look Ahead Limiter Delayed Release: 100ms – 1000ms (1Sec) Phase 0 or 180 degrees Left/Right Reverse checkbox Analog Out: -79.95dB to 0.0dB, 0.05dB steps, or OFF Digital Out: -35.95dB to 0.0dB, 0.05dB steps, or OFF page A – 10 VP-8IP / Sept 2013...
  • Page 240 PC directly to the VP‑8 Software Remote Control Supplied Windows® VP‑8 GUI software affords control of all system and processing parameters via a 10/100BaseT Ethernet interface. page A – 11 VP-8IP / Sept 2013...

Table of Contents