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StudioComm 76DA User Manual

Central controller, control console
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for Surround
Model 76DA Central Controller and
Model 77 Control Console

User Guide

Issue 10, October 2016
This User Guide is applicable for systems consisting of:
Model 76DA: serial number M76DA-01151 and later
with software version 4.20 and higher and FPGA version 4.12 and higher;
Model 77: serial number M77-00151 and later with software version 4.20 and higher
© 2016 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50241-1016, Issue 10

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Summary of Contents for StudioComm 76DA

  • Page 1: User Guide

    Issue 10, October 2016 This User Guide is applicable for systems consisting of: Model 76DA: serial number M76DA-01151 and later with software version 4.20 and higher and FPGA version 4.12 and higher; Model 77: serial number M77-00151 and later with software version 4.20 and higher ©...
  • Page 2 This page intentionally left blank.

  • Page 3: Table Of Contents

    Surround Table of Contents Introduction..............5 Installation ..............9 Configuration ..............17 Operation..............39 Technical Notes ............46 Specifications ...............50 Appendix A—Connection Pin-Out Charts ....52 Appendix B—Sync Input Sources ........53 Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 3...
  • Page 4 Surround This page intentionally left blank. Issue 10, October 2016 Model 76DA/77 User Guide Page 4 Studio Technologies, Inc.

  • Page 5: Introduction

    Model monitor output level in real time. A major 76DA Central Controller and one or more strength of the Model 77 is its ability to associated Model 77 or Model 71 Control configure, under software control, many...
  • Page 6 Alternately, the L/R connection of the A sophisticated bass management func- actively selected surround or stereo input tion is integral to the Model 76DA’s design source can serve as the timing reference. and can be enabled if desired. It can apply A range of digital and analog surround (5.1)
  • Page 7 LFE. This terminology was carefully selected 9-pin female D-subminiature connector is to highlight the fact that this output channel used to connect the Model 76DA with up may include more than just LFE content. to four Model 77 or Model 71 Control Con- The bass management function, if enabled, soles.
  • Page 8 Multiple channels can also be simultaneously selected for muting or For flexibility, the StudioComm for Sur- “soloing.” round system is designed to easily inte- grate with equipment such as production...

  • Page 9: Installation

    first (or only) Model 77 Control Console. A cable is supplied Installation to connect the Model 76DA to the Model 77. If the needs of a specific installation In this section you will be installing the...
  • Page 10 AES3 digital audio sources. The digital Balanced AES3 digital audio signals monitor outputs are configured in two can also be used with the Model 76DA’s groups with separate choices available inputs if external coupling transformers for the pre-fader surround/stereo input C (“baluns”) are utilized.
  • Page 11 A wiring assembly prepared to metering, measurement, or other for the Model 76DA’s digital monitor out- signal monitoring equipment that requires puts, when set for unbalanced AES3 uninterrupted, full-level digital audio signal (75 ohms/1 Vpp), would typically have sources.
  • Page 12 AES3 tor loudspeakers. compatibility. 2) Connector type on Model 76DA is 25-pin female The analog monitor output channels are D-subminiature (DB-25F). Installer must provide male (DB-25M). Connector uses 4-40 threaded inserts for designed for connection to audio amplifiers...
  • Page 13 Stereo R cast applications, although they continue to be used by contemporary equipment. Notes: 1) Connector type on Model 76DA is 25-pin female D-subminiature (DB-25F). Installer must provide Tri-level sync signals were primarily asso- male (DB-25M). Connector uses 4-40 threaded inserts ciated with facilities that supported high- for locking with mating plug.
  • Page 14 Common Support is provided for two remote control input functions: remote mute all and re- Note: Connector type on Model 76DA is 9-pin female D-subminiature (DE-9F). Connector uses 4-40 mote dim. These functions only impact the threaded inserts for locking with mating plug.
  • Page 15 Using Ohm’s law it’s quite DC Power Shield To/From Models 77/71 easy to determine whether the selected Note: Connector type on Model 76DA is 9-pin female cable will support the desired interconnec- D-subminiature (DE-9F). Connector uses 4-40 threaded inserts for locking with mating plug.
  • Page 16 Safety considerations require that the Model 76DA to Model 77 cable length are plug and associated outlet be easily discussed. Note the required current for accessible to allow rapid disconnec-...

  • Page 17: Configuration

    Consoles. LED will light if communication is estab- Configurable Parameters lished with the Model 76DA. If the Model 71’s status LED does not light check to see Many StudioComm functions can be config- if there is a device address conflict among...
  • Page 18 The specific unit and the Model 76DA into their configuration data is stored in nonvolatile configuration modes. Other connected Mod- memory, which is rated for thousands of...

  • Page 19: Bass Management

    Model 76DA, even if the sample rate is identi- Bass management can be enabled so that cal. The only compromise is that the SRC the function is active when the surround process adds a fixed input-to-output (group)

  • Page 20: Sample Rate

    So while one is “soloing” a channel (or the source. If the sync source is connected set of channels) two or more loudspeakers only to the Model 76DA then enabling ter- may be reproducing the signals. mination is typically appropriate. However, if the sync source is being “shared”...

  • Page 21: Reference Level

    This is per- listening location. formed by again pressing and holding 2. Place the StudioComm system in the the configuration button for two sec- normal operating mode, not the con- onds. The new reference level is now figuration mode.
  • Page 22 There are four dim implement the SPL display mode, it can level values available: –10.0, –15.0, –20.0, offer an enhanced experience for Studio- and –25.0 dB. Comm users. Issue 10, October 2016 Model 76DA/77 User Guide Page 22 Studio Technologies, Inc.
  • Page 23 The time delay applies to all input exact technical formula for how the Model signals and cannot be applied selectively. 76DA handles the surround to stereo down- A configured delay time is referenced to a mix function can be selected by way of four sample rate of 48 kHz.
  • Page 24 3 dB. (The available changes put can be configured as to its place in the in signal level can also be notated as 0 dB Model 76DA’s signal flow. The choices are or –3 dB.) pre- or post-downmix. In the pre-downmix...

  • Page 25: Restore Factory Defaults

    It’s also possible to use the StudioComm’s mode; normal operation of the Model 76DA output level offset capability to adjust the and other connected Model 71 and Model overall post-fader monitor output levels to 77 units will continue.
  • Page 26 A4; Model 77’s units have a default device address of A1. This ensures that, in most cases, no change will have to be made. Refer to Figure 9 for details. Issue 10, October 2016 Model 76DA/77 User Guide Page 26 Studio Technologies, Inc.
  • Page 27  Press and hold the configuration button for 2 seconds to enter or exit the configuration mode. These LEDs will light alternately when configuration mode is active. Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 27...
  • Page 28 Post-fader stereo digital and analog monitor output can be enabled. Note: The Model 77’s device address is the only parameter stored in the Model 77. All other parameters are stored in the Model 76DA. Issue 10, October 2016 Model 76DA/77 User Guide Page 28 Studio Technologies, Inc.
  • Page 29 Bass management high-pass filter slope 24 dB/octave. Bass management crossover frequency 80 Hz. Mute/solo pre-bass management mode. Note: Bass management capability only available at sample rates of 44.1, 48, 88.2, and 96 kHz. Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 29...
  • Page 30 Audio-synced-to-video sample rate 48 kHz. Pre-fader surround/stereo input C direct digital monitor output type balanced AES3 (110 ohms/5 Vpp). Post-fader surround/stereo digital monitor output type balanced AES3 (110 ohms/5 Vpp). Issue 10, October 2016 Model 76DA/77 User Guide Page 30 Studio Technologies, Inc.
  • Page 31 The 5-second button-press delay is a safety feature ensuring that the reference level will not be accidently changed. To permanently store the new value, you must still exit the configuration mode. Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc.
  • Page 32 SPL. the reference level in dB SPL, and auto reference level off. Default: Attenuation display mode selected. 85.0 dB SPL reference level. Auto ref level off disabled. Issue 10, October 2016 Model 76DA/77 User Guide Page 32 Studio Technologies, Inc.
  • Page 33 Press and hold the Dim button to display and select the dim level, remote mute all, and remote dim. Default: –20 dB dim level. Remote mute all enabled. Remote dim enabled. Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 33...
  • Page 34 C channel level change –6 dB when surround to stereo downmix function active. LFE level change full attenuation when surround to stereo downmix function active. Pre-fader surround digital monitor outputs pre-downmix. Issue 10, October 2016 Model 76DA/77 User Guide Page 34 Studio Technologies, Inc.
  • Page 35 –12.0, at which point the display will show – – – –. Default: 6.0 dB channel pop solo up offset level. –6.0 dB channel pop solo down offset level. Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 35...
  • Page 36 48 kHz sampling rate. The value is scaled up or down for other sample rates. Default: Input delay 0 ms for both A and B. Issue 10, October 2016 Model 76DA/77 User Guide Page 36 Studio Technologies, Inc.
  • Page 37 The range is –12.0 to 12.0 in 0.5-dB steps. Default: 0.0 dB post-fader surround monitor output level offsets. 0.0 dB post-fader stereo monitor output level offsets. Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 37...
  • Page 38 Model 77 to device address A1. If another connected unit is already configured for address A1, normal system operation will stop. Note: The 5-second button-press delay is a safety feature ensuring that the factory defaults will not be accidently restored. Issue 10, October 2016 Model 76DA/77 User Guide Page 38 Studio Technologies, Inc.

  • Page 39: Operation

    Model 76DA Central Controller Input Source Selection The Model 76DA’s front panel contains two To select an input source press one of the LEDs. The control console status LED will five input source buttons. The correspond- light whenever the Model 76DA is commu-...
  • Page 40 “remem- bered” when switching to one of the stereo input sources. Upon returning to surround input A, the surround to stereo downmix function will again become active. Issue 10, October 2016 Model 76DA/77 User Guide Page 40 Studio Technologies, Inc.
  • Page 41 flash. This exact level can be reached current sample rate value. Pressing and through the use of the rotary level control, Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 41...
  • Page 42 five full turns. But the Model 77’s software ated with the dim button will light whenever detects when the control is rotated more quickly and increases the amount of level Issue 10, October 2016 Model 76DA/77 User Guide Page 42 Studio Technologies, Inc.
  • Page 43 Going from mute mode to solo mode, or vice-versa, clears all active mutes or Model 76DA/77 User Guide Issue 10, October 2016 Studio Technologies, Inc. Page 43...
  • Page 44 During normal operation of the and analog monitor output levels as either StudioComm system the active input delay, the amount of attenuation or the sound A or B, can be selected. The channel mute/ pressure level (SPL).
  • Page 45 Model 76DA and then configured for operation. The functions are remote mute Display in dB SPL all and remote dim. When an external signal If the Model 77 is configured to display the...

  • Page 46: Technical Notes

    fixed amount. Its operat- a valid sync signal has been connected ing characteristics are identical to those of to the Model 76DA the sync status LED, the Model 77 Control Console, discussed located on the unit’s front panel, will light.

  • Page 47: Error Codes

    Upon mains power being applied to the array (FPGA) serves as the digital “heart” Model 76DA all connected Model 77 units of the Model 76DA and without it no audio will go through a power-up sequence. The activity can occur.) The only way to remedy...

  • Page 48: Sample Rate Conversion

    A digital audio signal con- applications all signals will have a sample nected to that input can have its sample rate of 48 kHz. A Model 76DA and all of its rate and timing re-synchronized to match normally connected input signals will be the Model 76DA’s internal timing.
  • Page 49 Professional Use of Channel Sta- or Model 71 Control Consoles. The Model tus block. They indicate a word length of 24 76DA provides 12 volts DC for use by the and the current sample rate. The correct control console’s circuitry. The DC output is CRC is also calculated and inserted.

  • Page 50: Specifications

    Maximum Level: +24 dBu into 2000 (2 k) ohms or greater Frequency Response, Digital Inputs to Analog Model 76DA Central Controller Monitor Outputs: 10 Hz-20 kHz +0.0/–0.3 dB @ 48 kHz sample rate; –3 dB @ 64 kHz General Audio: Supported Sample Rates: 32, 44.1, 48, 88.2, 96,...
  • Page 51 Control Console Interface: Type: RS-485, 115.2 kbit/s, 8-1-N Application: up to three Model 71 Control Polling Interval: 50 milliseconds Consoles can be connected to a Model 76DA Power: 12 volts DC, 500 milliamperes maximum Central Controller Connector: 9-pin female D-subminiature (DE-9F)

  • Page 52: Appendix A-Connection Pin-Out Charts

    Post-Fader Stereo Stereo R Notes: 1) All signals transformer-coupled digital audio; selectable for balanced or unbalanced AES3 Notes: 1) Connector type on Model 76DA is 25-pin compatibility. D-subminiature female (DB-25F). Installer must provide male (DB-25M). Connector uses 4-40 threaded inserts 2) Connector type on Model 76DA is 25-pin for locking with mating plug.

  • Page 53: Appendix B-Sync Input Sources

    Surround Appendix B—Sync Input Sources The Model 76DA’s sync input has been tested and confirmed for correct operation with the following sync signals: Word Clock: Square wave signal with rate of 32, 44.1, 48, 88.2, 96, 176.4, or 192 kHz.

This manual is also suitable for:

77 control console

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