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StudioComm 760-03 User Manual

Central controller and control console
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for Surround
Model 760-03 Central Controller and
Model 77 Control Console
User Guide
Issue 4, October 2016
This User Guide is applicable for systems consisting of:
Model 760-03: serial number M760-03-00151 and later with
software version 4.20 and higher and FPGA version 4.15 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
50247-1016, Issue 4

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  • Page 1 Issue 4, October 2016 This User Guide is applicable for systems consisting of: Model 760-03: serial number M760-03-00151 and later with software version 4.20 and higher and FPGA version 4.15 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

    Revision History............4 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 ........54 Appendix C—Downmix Formulas.........55 Model 760-03/77 User Guide Issue 4, October 2016 Studio Technologies, Inc. Page 3...

  • Page 4: Revision History

    Revised specifications to reflect final audio performance measurements. Issue 2, January 2015: • Text clarifications. • Reflects final product nomenclature (Model 760-03/Model 77). Issue 1, April 2014: • Initial release (as Model 76DA-110/Model 77). Issue 4, October 2016 Model 760-03/77 User Guide Page 4 Studio Technologies, Inc.

  • Page 5: Introduction

    Model output level in real time. A major strength 760-03 Central Controller and one or more of the Model 77 is its ability to configure, associated Model 77 or Model 71 Control under software control, many important Consoles.
  • Page 6 Model 760-03’s digital audio A sophisticated bass management func- timing reference. For synchronization with a tion is integral to the Model 760-03’s design master timing reference a dedicated source and can be enabled if desired. It can apply...
  • Page 7 Several of the bass management control signals. AC mains power is con- functions can be configured to match the nected directly to the Model 760-03, with an requirements of specific installations. acceptable range of 100 to 240 V, 50/60 Hz.
  • Page 8 Multiple channels can also be simultane- For flexibility, the StudioComm for Surround ously selected for muting or “soloing.” system is designed to easily integrate with equipment such as production intercom...

  • Page 9: Installation

    first (or only) Model 77 Control Console. Installation A cable is supplied to connect the Model 760-03 to the Model 77. If the needs of a In this section you will be installing the specific installation dictate, an alternate-...
  • Page 10 C can have an independent balanced AES3 (110 ohms, 5 Vpp) compatible. sample rate and timing reference and still 2) Connector type on Model 760-03 is 25-pin female be monitored correctly. Refer to the Techni- D-subminiature (DB-25F). Installer must provide male (DB-25M).
  • Page 11 AES3 (110 ohms, 5 Vpp) compatible. remains unused. Each set of three pins 2) Connector type on Model 760-03 is 25-pin female D-subminiature (DB-25F). Installer must provides an independent interface. In the provide male (DB-25M).
  • Page 12 + terminal as signal high, and with digital audio input capability. only the Model 760-03’s shield terminal as Post-Fader Stereo Digital Monitor Output the signal low/shield. Leave the – terminal unconnected. For correct unbalanced op- The post-fader stereo digital monitor output eration, it is important not to connect –...
  • Page 13 Stereo R Tri-level sync signals were primarily asso- ciated with facilities that supported high- Notes: 1) Connector type on Model 760-03 is 25-pin female D-subminiature (DB-25F). Installer must provide male definition (HD) video equipment, however (DB-25M). Connector uses 4-40 threaded inserts for the importance of this type of sync seems locking with mating plug.
  • Page 14 Input DC Power Shield To/From Models 77/71 Remote Spare 2 Input Note: Connector type on Model 760-03 is 9-pin female Remote Common Common D-subminiature (DE-9F). Connector uses 4-40 threaded inserts for locking with mating plug. Note: Connector type on Model 760-03 is 9-pin female D-subminiature (DE-9F).
  • Page 15 The differential transmission scheme used When connecting multiple control consoles by the system’s RS-485 interface makes to a Model 760-03 all nine pins of each an interconnection in excess of 1000 feet interconnecting cable can be connected in (>300 meters) easily possible. The limiting parallel (“multed”).
  • Page 16 Brown through a power-up sequence after mains Protective Earth (E) Green/Yellow power is applied to the Model 760-03. Each of the Model 71’s three LEDs will light momentarily. After these LEDs have been Safety Warning: The Model 760-03 lit, the device address will be shown briefly...

  • Page 17: Configuration

    Surround Only after the Model 760-03 and all con- • Post-Fader Stereo Digital and Analog nected Model 77 and Model 71 units have Monitor Output correctly powered up will full system oper- • Bass Management ation begin. It’s possible that audio signals •...
  • Page 18 760-03 enters its configuration mode it will in tens of years. Note that memory integrat- immediately mute the monitor outputs as a ed circuits are located in the Model 760-03 speaker protection measure. When a Model Central Controller as well as the Model 77 77 enters the configuration mode its array...
  • Page 19 Model round and, if present, stereo loudspeaker 760-03, even if the sample rate is identical. systems are determined can a plan for The only compromise is that the SRC pro- bass management be established.
  • Page 20 Sync Source monitors. The StudioComm for Surround system allows a precise post-fader surround The Model 760-03 requires that the desig- digital and analog monitor output level to be nated external timing reference (sync) be stored, and then enabled by pressing the defined.
  • Page 21 (SPL). It is used in The new reference level is now stored in conjunction with the reference level in dB the Model 760-03’s nonvolatile memory. SPL configuration and the stored reference Only by repeating the entire procedure level.
  • Page 22 –10.0, non-zero, input delay values will be se- –15.0, –20.0, and –25.0 dB. lected. This could be appropriate in applica- tions where multiple video display systems Issue 4, October 2016 Model 760-03/77 User Guide Page 22 Studio Technologies, Inc.
  • Page 23 When the surround to stereo downmix exact technical formula for how the Model function is active the center (C) input is 760-03 handles the surround to stereo routed to both the left (L) and right (R) downmix function can be selected by way post-fader monitor outputs.
  • Page 24 To provide assistance during room cali- output can be configured as to its place bration, the relative output levels of the in the Model 760-03’s signal flow. The post-fader surround and stereo digital and choices are pre- or post-downmix. In the...
  • Page 25 Model will have to be made. Refer to Figure 10 760-03 and other connected Model 71 for details. and Model 77 units will continue. When a Model 71 enters its configuration mode...
  • Page 26 The selected configuration parameters will be stored in a nonvolatile memory device that is located inside this specific Model 71. Issue 4, October 2016 Model 760-03/77 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 760-03/77 User Guide Issue 4, October 2016 Studio Technologies, Inc. Page 27...
  • Page 28 Post-fader stereo 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 760-03. Issue 4, October 2016 Model 760-03/77 User Guide Page 28...
  • Page 29 Bass management high-pass filter slope 24 dB-per-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 760-03/77 User Guide Issue 4, October 2016 Studio Technologies, Inc. Page 29...
  • Page 30 32, 44.1, 48, 88.2, 96, 176.4, and 192 kHz. Default: Sync source is L/R of currently selected input. Sync input terminated. Audio-synced-to-video sample rate 48 kHz. Issue 4, October 2016 Model 760-03/77 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 760-03/77 User Guide Issue 4, 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 4, October 2016 Model 760-03/77 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 760-03/77 User Guide Issue 4, 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 monitor outputs pre-downmix. Issue 4, October 2016 Model 760-03/77 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 760-03/77 User Guide Issue 4, 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 4, October 2016 Model 760-03/77 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 760-03/77 User Guide Issue 4, 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 4, October 2016 Model 760-03/77 User Guide Page 38 Studio Technologies, Inc.

  • Page 39: Operation

    To select an input source press one of the two LEDs. The control console status five input source buttons. The correspond- LED will light whenever the Model 760-03 ing LED will light to indicate that the input is communicating with the one or more has been selected.
  • Page 40 Upon returning to surround input folding down all channels associated with A, the surround to stereo downmix function the selected surround input. will again become active. For details on the Issue 4, October 2016 Model 760-03/77 User Guide Page 40 Studio Technologies, Inc.
  • Page 41 The surround/stereo monitor output select put levels are precisely the same as that button is also used to display the system’s Model 760-03/77 User Guide Issue 4, October 2016 Studio Technologies, Inc. Page 41...
  • Page 42 five full turns. level control or by the reference level button. But the Model 77’s software detects when Issue 4, October 2016 Model 760-03/77 User Guide Page 42 Studio Technologies, Inc.
  • Page 43 Going from mute mode to solo mode, or Model 760-03/77 User Guide Issue 4, 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 de- the amount of attenuation or the sound lay, A or B, can be selected. The channel pressure level (SPL).
  • Page 45 Model 760-03 and then configured for will get more negative. operation. The functions are remote mute all and remote dim. When an external...

  • Page 46: Technical Notes

    The LED will continue to display the visual indications are provided. On the Mod- status of the dim function as selected by el 760-03 the sync status LED will flash. On other Model 77 and Model 71 units. all connected Model 77 Control Consoles...
  • Page 47 7. Displays Model 760-03’s logic device (FPGA) software version Power Down After a successful system power-up Great care was taken in the Model 760-03’s sequence normal operation will then design to minimize the chance that clicks, commence. pops, or other objectionable audio signals...
  • Page 48 48 kHz. capability. A digital audio signal connected A Model 760-03 and all of its normally con- to that input can have its sample rate and nected input signals will be “locked” to the...
  • Page 49 AES3 digital audio monitor output channel Model 77 or Model 71 Control Consoles. data are actively controlled by the Model The Model 760-03 provides 12 Vdc for use 760-03’s software. The Channel Status by the control console’s circuitry. The DC...

  • Page 50: Specifications

    Surround Specifications Analog Monitor Outputs: 8 Configuration: organized as one surround (5.1) and one stereo (2-channel) Model 760-03 Central Controller Type: electronically balanced, source impedance 200 ohms General Audio: Supported Sample Rates: 32, 44.1, 48, 88.2, 96, Nominal Level: +4 dBu @ –20 dBFS input source 176.4, and 192 kHz...
  • Page 51 Control Console Interface: Type: RS-485, 115.2 kbit/s, 8-1-N Application: up to four Model 77 Control Con- Polling Interval: 80 milliseconds, nominal soles can be connected to a Model 760-03 Central Power: 12 Vdc, 500 mA maximum Controller Connector: 9-pin female D-subminiature (DE-9F)

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

    Note: Connector type on Model 760-03 is 9-pin female D-subminiature (DE-9F). Connector uses 4-40 threaded inserts for locking with mating plug. Notes: 1) Connector type on Model 760-03 is 25-pin female D-subminiature (DB-25F). Installer must provide male (DB-25M). Connector uses 4-40 threaded inserts for Connections for Remote Control Inputs locking with mating plug.
  • Page 53 DC – (12 V Return) To Models 77/71 DC Power Shield To/From Models 77/71 Note: Connector type on Model 760-03 is 9-pin female D-subminiature (DE-9F). Connector uses 4-40 threaded inserts for locking with mating plug. Connections between Model 760-03 and...

  • Page 54: Appendix B-Sync Input Sources

    Surround Appendix B—Sync Input Sources The Model 760-03’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.

  • Page 55: Appendix C-Downmix Formulas

    C = (0.707 or 0.5)L + (0.707 or 0.5)R + (0.707 or 0.5)C + (0.5 or 0.35)LS + (0.5 or 0.35)RS + (0 or 0.5)LFE Model 760-03/77 User Guide Issue 4, October 2016 Studio Technologies, Inc. Page 55...

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