Related Manuals for Linear Acoustic ARC
Summary of Contents for Linear Acoustic ARC
- Page 1 Linear Acoustic ® Automatic Realtime Control Installation & User’s Guide Version 0.0.64 with Addendum for V1.2 2001-00520-000 TelosAlliance.com...
- Page 2 User Warnings and Cautions The installation and service instructions in this manual are for use by qualified personnel only. To avoid electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Refer all servicing to qualified personnel This instrument has an autoranging line voltage input.
- Page 3 Updates Linear Acoustic ARC features and operations are determined largely by software. The Telos Alliance strives to provide the most stable and feature-rich software available. We encourage you to check for software updates from time to time by visiting our website or by contacting us directly.
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Page 4: We Support You
By Email. Non-emergency technical support is available at Support@TelosAlliance.com. By Web The Linear Acoustic Web site has a variety of information that may be useful for product selection and support. The URL is https://www.telosalliance.com/Linear. SERVICE You must contact Telos Alliance before returning any equipment for factory service. We will need your unit’s serial number, located on the back of the unit. -
Page 5: Table Of Contents
Table of Contents User Warnings and Cautions We support you… Warranty Introduction ARC: What It Is, and Why We Made It About This User Guide Front and Rear Panel Overview ARC Front Panel ARC Rear Panel I/O, Clocking and Reference... - Page 6 Reference Clock System Menu Software Updates IP Menu Setting IP Addresses Detailed Setup and Configuration Name and Location I/O Setup Input Routing and Reference Output Routing GPI/O Delays, Latency and A/V Sync An Introduction to APTO™ But First, a Word on Television Loudness What Is APTO? 39/40 What Makes APTO Different?
- Page 7 Clock Reference Sample Rate/Resolution/Frequency Response Ethernet Parallel GPI/O Control Port Front Panel Controls and Indicators Power Dimensions and Weight Environmental Intended Location Regulatory Warranty Addendum 1 - ARC V1.2 Software ARC V1 2 Software SNMP Logging Loudness Logs System Logs...
- Page 9 We’re grateful that you have chosen audio tools from Telos® Systems, Omnia® Audio, Axia® Audio, Linear Acoustic®, 25-Seven Systems®, and Minnetonka Audio®. We’re here to help you make your work truly shine. We hope that you enjoy your Telos Alliance product for many years to come and won’t hesitate to let us know if we can help in any way.
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Page 11: Introduction
Congratulations on your purchase of the Linear Acoustic ARC! The name “ARC” – which stands for “Automatic Realtime Control” – provides a good clue as to what it is: A realtime television loudness processor featuring APTO®, our latest loudness adaptation algorithm. -
Page 13: Front And Rear Panel Overview
Basic configuration and status monitoring can be performed using the front panel controls as outlined in Chapter 4. Connecting to ARC via the web-based user interface (more on that in Chapter 5) provides easier navigation and full control of the unit. -
Page 14: Arc Rear Panel
Chapter 2 | ARC Rear Panel Figure 2-2 – ARC rear panel The rear panel of ARC contains the following connections: One parallel GPI/O control port (female DB-15) for five inputs and five outputs (A) ♦ One AES-3 Input (B) and one AES-3 Output (C) on female BNC connectors ♦... -
Page 15: I/O, Clocking And Reference
Chapter 3 | I/O, Clocking and Reference SDI I/O ARC can access any of the eight audio pairs carried on an incoming HD- or SD-SDI stream and provide de-embedding and pair shuffling at its input. Note: ARC will not generate SDI video signals, so in order for the unit to output an SDI signal, it must receive one. -
Page 16: Reference Clocking And Sample Rate Converters
♦ the SDI input must be used When using AES-3 I/O, ARC can be referenced to either the AES-3 clock (using the SRCs in the SDI path) or to the SDI ♦ clock (using the SRCs in the AES-3 path) When using an AES-3 source without an accompanying reference, ARC’s 48kHz internal clock can be used as the system... -
Page 17: Installation And Initial Setup Using The Front Panel Interface
ARC is a 1RU product intended to be permanently installed in a standard 19 ½” equipment rack and secured with four standard rack screws. ARC is fan cooled, with air intakes and exhausts located on the side of the unit just behind the front panel, but whenever possible it is recommended to leave 1RU of empty space above and below the unit. -
Page 18: The Information Screen
Pressing the Right button navigates to the Information screen. Figure 4-2 – Front panel Information screen The name of this particular ARC and its location are displayed at the top of the screen. These values can be customized using the remote interface as detailed in Chapter 5. -
Page 19: Loudness Display Screen
Installation and Initial Setup Chapter 4 | Loudness Display Screen Pressing the Right button once more brings you to the Loudness Display screen which shows a numeric medium-term loudness value of each processed path, Program 1 and Program 2. Figure 4-3 – Front panel Loudness screen Each program can be given a “friendly”... -
Page 20: Ip Configuration Screen
Installation and Initial Setup Chapter 4 | IP Configuration Screen Another press of the Right button brings you to the IP Configuration screen for the Control port. Figure 4-5 – Front panel IP configuration screen Important! Both the Control and AES67 connections must be connected to 1000BASE-T (Gigabit) switch ports. If a port will not be used, it should not be connected to a switch but does require a specific configuration described below. -
Page 21: Locate Mode
Locate Mode Our sincere hope is that you like ARC so much that you’ll eventually end up with dozens of them populating your racks, but since one ARC looks pretty much like another, we’ve come up with a way to help you identify an individual unit. -
Page 23: Remote User Interface
ARC. Once ARC and your computer are connected to your network, enter the IP address of the ARC to which you want to connect in the URL field of your browser. Once connected, the Home Screen will appear. As you navigate through the user interface, clicking on the ARC logo (A) in the top left corner will always return you to this screen. -
Page 24: User Accounts And Logging In
Remote User Interface Chapter 5 | Multiple users can connect to the same ARC hardware simultaneously. Anyone connected to the unit will be able to see the information on this screen including the unit’s name (B) and physical location (C). -
Page 25: Program 1 And Program 2 Menus
Remote User Interface Chapter 5 | Program 1 and Program 2 Menus Each processing path – Program 1 and Program 2 – has its own page with controls for the APTO loudness processing as well as detailed loudness metering. For illustration purposes, we’ll use Program 1 here. The Program screen is divided into four basic sections: Input meters (A), Output meters (B), Routing status (D), and APTO loudness processing (C). -
Page 26: Input Meters
Remote User Interface Chapter 5 | Input Meters The Input Meters are based on the ITU-R BS1770-4 and EBU-Tech3341 standards. While visually rather simple and easy to read at a glance, the input meter section contains a wealth of level and loudness information. Figure 5-4 –... - Page 27 Remote User Interface Chapter 5 | In the center of the Input Meter section, you’ll find the following numeric readouts: At the top, the Average Integrated Loudness display (D) shows the average loudness measurement since the last input ♦ meter reset Either LUFS or LKFS will be indicated depending upon the current profile ¸...
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Page 28: Output Meters
Remote User Interface Chapter 5 | Output Meters Like the Input Meter, the Output Meter is based on the ITU-R BS1770-4 and EBU-Tech3341 standards and is designed to be easy to read at a glance while providing a host of detailed information about the output audio. Figure 5-5 –... - Page 29 Remote User Interface Chapter 5 | The center of the Output Meter section contains the following numeric readouts: At the top, the Average Integrated Loudness display (D) shows the average loudness measurement since the last input ♦ meter reset Either LUFS or LKFS will be indicated depending upon the current profile ♦...
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Page 30: Routing Status
Remote User Interface Chapter 5 | Routing Status The Input field (A) shows the source of the audio being routed to the Program 1 or Program 2 APTO processing engine. The Output field (B) indicates the output path(s) to which the processed audio is being routed. Actual Input and Output routing is configured in the I/O menu. -
Page 31: I/O Menu
Remote User Interface Chapter 5 | I/O Menu The process for setting up input and output configuration is covered in detail in Chapter 6 (“Detailed Setup and Configuration”) and will not be duplicated here, however, an explanation of the information found on the main I/O page is provided below. -
Page 32: Processor Inputs And Outputs
Remote User Interface Chapter 5 | Processor Inputs and Outputs The middle section of the I/O screen is devoted the Processor Inputs and Outputs. Which input audio program - selected from among all available SDI, AES-3, and AES67 sources in the dropdown menus – is routed to the Program 1 and Program 2 APTO processing engines is selected in the Processor Inputs menu (A). -
Page 33: Reference Clock
The elapsed time since the last reference change is indicated here as well. Important: At the risk of stating the obvious, proper reference is critical for trouble-free operation. This is true for ARC and every other digital audio device in your plant. Improper clocking is one of the most common causes of clicks, pops, audio dropouts, and other anomalies, and is at the root of a high percentage of support inquiries. -
Page 34: System Menu
Locate Mode will not affect the audio. It should come as no surprise that clicking on the Reboot Unit button (H) – wait for it – reboots ARC and engages the hard relay bypass for the duration of the reboot process. -
Page 35: Ip Menu
Control and AES67 Ethernet ports. Setting IP Addresses By default, ARC is set up with DHCP enabled and will automatically receive an IP address when its Control Ethernet port is connected to a network with a DHCP server. - Page 36 Figure 5-11 – IP menu Sync, QoS, and PTP Menu As explained in Chapter 3, whenever ARC is set up to use AES67 audio either on the input, the output, or both, it must be slaved to an external PTP clock for reference.
- Page 37 Remote User Interface Chapter 5 | Figure 5-12 – PTP menu...
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Page 39: Detailed Setup And Configuration
Name and Location Once logged into ARC, click on the System menu (A). Click in the Unit Name field (B) and type in a “friendly” name for this particular unit. You may also enter the physical location of the unit in the “Location” field (C). -
Page 40: I/O Setup
Processor Outputs section (D). Important: At the risk of stating the obvious, proper reference is critical for trouble-free operation. This is true for ARC and every other sync’d device in your plant. Improper clocking is one of the most common causes of clicks, pops, audio dropouts, and other anomalies, and is at the root of a high percentage of support inquiries. -
Page 41: Output Routing
Detailed Setup and Configuration Chapter 6 | Output Routing Each output type - SDI, AES67, and AES-3 – has its own sub-menus. SDI Outputs Figure 6-3 – SDI I/O menu To configure the SDI outputs, click on the SDI sub-menu in the “I/O” menu (A). In the “SDI Out”... - Page 42 Detailed Setup and Configuration Chapter 6 | Pair shuffling can be accomplished by selecting a different SDI input for any given SDI output ♦ To route processed (loudness-controlled) audio to an SDI output pair, choose “Program 1” or “Program 2” ♦...
- Page 43 Detailed Setup and Configuration Chapter 6 | AES67 outputs are configured in the AES67 sub-menu and in much the same was as SDI outputs. Click on the AES67 sub-menu (A) of the “I/O” menu. Use the AES67 dropdown menu (C) to select which audio gets routed to each SDI output pair.
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Page 44: Gpi/O
If there are any anticipated reference clock changes (either intentional or unplanned) it is safer to leave it enabled. GPI/O ARC features five GPI and five GPO functions through its rear panel DB-15 connector, activated by a momentary contact closure. - Page 45 Detailed Setup and Configuration Chapter 6 | Figure 6-6 – GPI/O menu The State Indicator (B) for each function will light for the duration of the closure on GPIs. For GPOs, it will light for the duration of an active event. Certain GPIs have selectable Parameters (C) associated with them.
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Page 46: Delays, Latency And A/V Sync
Delays, Latency and A/V Sync Latency through ARC varies depending on which inputs and outputs are used and whether or not SRCs are enabled. In any case, any latency will result in the processed audio trailing the video by that amount at the SDI output. - Page 47 Detailed Setup and Configuration Chapter 6 | Latency values for Firmware V0.0.64 are as follows: AES-3 input to AES-3 output with SRCs disabled: 30.5ms ♦ AES-3 input to AES-3 output with AES-3 input SRC enabled: 33.5ms ♦ SDI input to SDI output with SRCs disabled: 33.5ms ♦...
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Page 49: An Introduction To Apto
What Is APTO? The audio processing within ARC is performed by Linear Acoustic® APTO™, our latest and most advanced adaptive loudness control algorithm to date. -
Page 50: What Makes Apto Different
As mentioned previously, ARC includes a host of factory profiles for various loudness standards and deliverable platforms, but individual controls to fine tune both processing stages are also brought out to the user interface and are described in greater... -
Page 51: Basic Processing And Loudness Control
Choosing an APTO Profile In most cases, ARC is truly a “set and forget” processor and simply choosing a factory profile is all that is required. To select a profile, navigate to the Program 1 (or Program 2) menu (A), click the Load button in the APTO Loudness Control section (B), mouse over Factory Presets (C), then choose an appropriate profile from the Factory Preset List (D). -
Page 52: Basic Apto Controls
The currently selected profile is displayed in the Profile window (A). Note: In the current version of ARC, there is no indication that the factory profile has been modified as a result of changing the values or settings of individual controls. This feature will be included in an upcoming software upgrade. -
Page 53: Load And Save
Basic Processing and Loudness Control Chapter 8 | Load and Save The Load button (B) is used to recall factory profiles, user profiles, or to import a profile previously saved to your computer. Any changes or modifications to the current profile can be saved by using the cryptically-named Save button (C). Bypass APTO can be bypassed so that the input audio is passed through to the output without being processed by clicking on the Bypass control (D). -
Page 54: Dialog Normalization
Basic Processing and Loudness Control Chapter 8 | Dialog Normalization The Dialog Normalization control (L) enables dialog detection and measurement. When enabled, APTO’s Compliance processing stage uses long-term speech-only measurements rather than the overall input program loudness to ensure the output target level is achieved. -
Page 55: Advanced Processing Controls
Advanced Processing Controls Chapter 9 | Advanced Processing Controls Advanced APTO Controls As we’ve mentioned before, most users and applications will be well served by simply selecting the appropriate factory profile according either to compliance regulations or the delivery platform. At most, some adjustments to the Basic controls may be necessary. -
Page 56: Audio High Pass Filter Cutoff Frequency
Advanced Processing Controls Chapter 9 | Audio High Pass Filter Cutoff Frequency The High Pass Filter control (A) sets the cutoff frequency for the high pass filter applied to the input signal. No audio below this frequency will make it through to the APTO processing engine. In most cases, this control should be set to “Off”, but in some instances, it may be beneficial to filter out any sub-audible frequencies (below 20Hz). -
Page 57: Foreground Sounds Coefficient
Null Area Coefficient The primary goal of the APTO processing within ARC is to deliver a consistent average output level as set by the Target Level control. This does not mean, however, that the actual output audio level must never deviate from this value. In fact, a certain amount of dynamic range helps preserve the artistic integrity of the original programming and makes for a more engaging audio experience for the viewer. -
Page 58: Average Maximum Attenuation
Many factors can influence whether or not content at the output of ARC is compliant. These include the level consistency of the incoming audio, program duration, the difference between the average input level and the Target level, the amount of Adaptation employed, and the settings of many of the controls listed in this chapter. -
Page 59: Average Input Level
Advanced Processing Controls Chapter 9 | Average Input Level The value of the Average Input Level control (K) should be set to match the average level of the input audio as it serves as the mid-point value of the comfort zone defined by the Null Area Coefficient control. For content that has been previously analyzed and loudness corrected in the file domain, this value will be easy to determine. -
Page 61: Specifications
Chapter 10 | Specifications Processing Linear Acoustic® APTO™ Loudness Adaptation Algorithm with processing for two PCM stereo or mono programs ♦ AES-3 I/O One 2-channel input and one 2-channel output via 75 Ohm BNC female connectors, internally terminated; signal levels ♦... -
Page 62: Clock Reference
Specifications Chapter 10 | Clock Reference 48kHz reference via SDI, AES-3, PTP v2, or internal clock ♦ Sample Rate/Resolution/Frequency Response 48kHz, 24-bit, 20Hz – 20kHz ♦ Ethernet Two Gigabit RJ-45 connections, one each for AES67 and Control ♦ Parallel GPI/O Control Port Future feature;... -
Page 63: Dimensions And Weight
Specifications Chapter 10 | Dimensions and Weight 19”W x 9”D x 1.75” H (approximately 48.2 x 22.0 x 4.5 cm) ♦ Net weight approximately 9.0 pounds (4.08kg) ♦ Shipping weight approximately 12.0 pounds (5.44kg) ♦ Environmental Operating temperature 0 to 50 degrees Celsius (32 to 122 degrees Fahrenheit) ♦... -
Page 65: Addendum 1 - Arc V1.2 Software
ARC V1.2 Software Version 1.2 of the ARC software was released in April 2020. V1.2 is, as of this writing, the current shipping version. All ARC units running the original V0.0.64 software can be field updated. The update and installation instructions can be downloaded www.telosalliance.com/linear/arc... -
Page 66: Logging
Addendum 1 Chapter 11 | Logging ARC has three logs available for download when the Logging button (A) is enabled: A 6-hour rolling loudness log for each program path ♦ A loudness event log ♦ A system event log ♦... - Page 67 Addendum 1 Chapter 11 | Figure A1-2 – Logging menu...
- Page 69 Telos Alliance Warranty Telos Alliance Limited Warranty For the latest Telos Alliance warranty, visit: telosalliance.com/warranty.
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