The Studio Technologies Model 76D/77 Surround Monitoring System combines Model 76D Central Controller and Model 77 Control Console for simple and effective monitoring of multi-channel surround (5.1) and stereo (2-channel) audio material in recording, post-production, and broadcast facilities.
The Studio Technologies Model 76D/77 Surround Monitoring System is a complete multi-channel monitor system. As creating and distributing multi-channel surround (5.1) and stereo (2-channel) audio material has become a day-to-day reality, the ability to simply and effectively monitor these sources is imperative for recording, post-production, and broadcast facilities. Studio Technologies has addressed these needs with the StudioComm for Surround Model 76D Central Controller and Model 77 Control Console. With digital audio inputs, digital monitor outputs, support for multiple user control surfaces, and an extensive set of operating resources it's a simple task to integrate a monitoring system into virtually any facility. The carefully selected group of features, including surround and stereo inputs, configurable input-signal time delay, multiple pre- and post-fader outputs, configurable downmix and mute/solo functions, and bass management, along with a multi-format sync input, make the system powerful yet simple to operate. And by using the best of contemporary technology, as well as following rigorous design practices, the system's audio quality is excellent.
Model 77 Control Console
The Studio Technologies Model 77 Control Console is designed for use with a StudioComm for Surround Model 76D, Model 76DA, Model 760-01, Model 760-02, or Model 760-03 system. It's the system's command center and resides at an operator's location, allowing fingertip selection of all monitoring functions. The Studio Technologies Model 77 Control Console's numerous LED indicators provide complete status information. A 4-digit numeric display indicates the post-fader monitor output level in real time. A major strength of the Studio Technologies Model 77 is its ability to configure, under software control, many important operating parameters. Intended for secondary monitoring locations, the Studio Technologies Model 71 Control Console is a compact user control surface. It provides three of the most basic functions: a rotary level control, dim on/off button, and reference level on/off button.
Model 76D Central Controller
The core of this StudioComm for Surround system is the Model 76D Central Controller. The one-rack-space unit contains circuitry that supports digital audio inputs, digital monitor outputs, processing, and the user interface. The Model 76D provides two surround (5.1) and three stereo digital audio inputs. These unbalanced digital inputs are AES3-compliant; sources of this type are ubiquitous in most post-production and broadcast environments. The inputs allow a sample rate of up to 192 kHz and a bit depth of up to 24 to be directly supported. Circuitry associated with one of the stereo inputs provides sample rate conversion (SRC) capability, allowing a wide range of digital audio sources to be monitored. Up to 340 milliseconds of input delay can be selected to compensate for processing delays in an associated video path. For flexibility, two delay values can be configured, allowing real-time selection as desired. A number of different signals can serve as the Model 76D's digital audio timing reference. For synchronization with a master timing reference a dedicated source of word clock, DARS (AES11), bi-level video, or tri-level video can be connected. Alternately, the L/R connection of the actively selected surround or stereo input source can serve as the timing reference.
Studio Technologies Model 76D/77 Surround Monitoring System Features
- AES3 unbalanced digital audio inputs
- AES3 digital audio outputs (selectable for balanced or unbalanced)
- Bass management capability
- Configurable downmix
- Channel mute/solo
- Level adjustment, reference level, and dim
Studio Technologies Model 76D/77 Surround Monitoring System Specifications
- Model 76D Central Controller:
- General Audio:
- Supported Sample Rates: 32, 44.1, 48, 88.2, 96, 176.4, and 192 kHz
- Word Length: 24 bits Maximum
- Internal Processing: 32 bits
- Input-to-Output Latency: Two Samples (e.g., 0.042 milliseconds @ 48 kHz Sample Rate)
- Digital Audio Inputs: 5 (18 Audio Channels)
- Configuration: Two Surround (5.1) and Three Stereo
- Type: AES3 Unbalanced (75 Ohms/1 Vpp)
- Connectors: BNC (Per IEC 60169-8 Amendment 2
- Sample Rate Conversion (SRC):
- Application: Available on Stereo Input C
- Input Sample Rate Range: 8 to 216 kHz, Limited to 1/6 to 6 Times the Output Sample Rate
- Latency: 1 millisecond, Nominal
- Sync Source: Configured to Follow L/R of Currently Selected Input or Signal Connected to Sync Input
- Sync Input:
- Compatible Sources: Word Clock, DARS (AES11), Bi-Level Video, Tri-Level Video
- Jitter: 4 ns pp Maximum
- Connector: BNC (Per IEC 60169-8 Amendment 2)
- Termination: 75 Ohms, Selectable On/Off
- Digital Monitor Outputs: 16 (Eight Pairs)
- Configuration: Organized As Two Surround (5.1) and Two Stereo
- Dynamic Range: >135 dB
- Type: AES3 Balanced (110 Ohms/5 Vpp) or Unbalanced (75 Ohms/1 Vpp), Selectable
- Connector: 25-Pin Female D-Subminiature (DB-25F)
- Configurable Input Delay: 0 to 340 milliseconds @ 48 kHz Sample Rate (Scales Up Or Down Depending on Actual Sample Rate)
- Post-Fader Monitor Output Level Offsets: Each Surround and Stereo Channel Independently Adjustable in 0.5-dB Steps Over a ±12-dB Range
- Bass Management:
- Supported Sample Rates: 44.1, 48, 88.2, and 96 kHz Only
- Crossover Frequency and Type: –6 dB @ 40, 50, 60, or 80 Hz, Symmetrical for Low-Pass and High-Pass Filters, Maximally Flat
- Filter Slope: 12 or 24 dB/Octave
- Overall Operation: Independent On/Off Selectable for Surround and Stereo Post-Fader Monitor Outputs
- Downmix:
- Functions: Surround to Stereo, Stereo to Mono
- Surround to Stereo:
- L @ 0 or –3 dB;
- R @ 0 or –3 dB;
- C @ –3 or –6 dB Summed with L and R;
- LFE @ Full Attenuation or –6 dB Summed with L and R;
- LS @ –3 or –6 dB Summed with L;
- RS @ –3 or –6 dB Summed with R;
- C, SUB, LS, and RS Monitor Outputs Mute
- Stereo to Mono:
- L @ –3 dB Summed with R @ –3 dB to C;
- L, R, LS, RS, and SUB Monitor Outputs Mute
- For a Surround Input, This Results in the C Output Being the Sum of L @ –3 or –6 dB, R @ –3 or –6 dB; C @ –3 or –6 dB, LFE @ Full Attenuation or –6 dB; LS @ –6 or –9 dB, and RS @ –6 or –9 dB
- Surround to Stereo:
- Functions: Surround to Stereo, Stereo to Mono
- Control Console Interface:
- Type: RS-485, 115.2 k bit/s, 8-1-N
- Polling Interval: 50 milliseconds
- Power: 12 Vdc, 500 mA Maximum
- Connector: 9-pin female D-Subminiature (DE-9F)
- Remote Control Inputs: 2
- Functions: Remote Mute All, Remote Dim
- Type: 5 VDC Logic, Activates on Closure to System Common
- Connector: 9-Pin Female D-Subminiature (DE-9F)
- AC Mains:
- Requirement: 100 to 230 V, +10/–15%, 50/60 Hz, 15 W Maximum
- Connector: 3-Blade, IEC 320 C14-Compatible (Mates with IEC 320 C13)
- Dimensions:
- Width: 19.00 inches (48.3 cm)
- Height: 1.72 inches (4.4 cm)
- Depth: 7.00 inches (17.8 cm)
- Mounting: One Space (1U) in a Standard 19-inch Rack
- Weight: 3.6 Pounds (1.6 kg)
- General Audio:
- Model 77 Control Console:
- Application: Up to Four Model 77 Control Consoles Can be Connected to a Model 76D Central Controller
- Power: 12 VDC Nominal (9 VDC Minimum), Maximum Current 100 mA, Provided by Model 76D Central Controller
- Control Data:
- Type: RS-485
- Data Rate/Format: 115.2 k bit/s, 8-N-1
- Connector: 9-Pin Female D-Subminiature (DE-9F)
- Dimensions (Overall):
- Width: 7.20 inches (18.3 cm)
- Height: 2.20 inches (5.6 cm)
- Depth: 5.40 inches (13.7 cm)
- Weight: 1.7 Pounds (0.8 kg)
Studio Technologies Model 76D/77 Surround Monitoring System Includes
- 1 x Studio Technologies Model 76D Central Controller
- 1 x Studio Technologies Model 77 Control Console
- 1 x Power Cord
- 1 x User Guide
- 3 Year Warranty
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