Data Sheet

Studio Technologies, Inc. StudioComm with Dante Support 792/793, Issue 1, Page 2
Dante audio resources include both surround and stereo inputs and outputs. The Dante surround input and output functions
consist of 16 independent channels while the stereo input and output functions support two channels. The Dante channels are
compatible with AES67 and support Dante’s ST 2110 implementation. Analog audio resources include a 16-channel surround
input, a 2-channel stereo input, and a 16-channel surround output.
Great care was taken in designing the system’s circuitry, ensuring that the character of the Dante digital and analog audio input
signals is preserved. All audio processing is performed in 32-bit logic using a high-speed field-programmable-gate-array (FPGA)
integrated circuit. The performance of the analog-to-digital and digital-to-analog functions will meet or exceed virtually any
professional audio product. The sonic performance of the StudioComm system is completely “pro” with no compromises.
The Model 792 Central Controller occupies one space (1U) in a standard 19-inch rack. Dante digital audio sources are interfaced
using one or two gigabit (GigE) Ethernet network connections that use RJ45 connectors. This arrangement allows switched or
redundant Dante operation. A third gigabit network connection provides an independent means of accessing the Model 792’s
configuration webpages. This ensures that facilities can support separate audio and maintenance networks. Standard connectors
on the Model 792 allow simple interfacing with Dante digital audio, analog audio, control console, and power connections. AC
mains power is connected directly to the Model 792, with an acceptable range of 100 to 240 V, 50/60 Hz. A source of nominal 12
volts DC can also be connected. If both power sources are connected the AC mains source will provide operating power while
the DC source serves as a “hot standby.”
Two Surround and Two Stereo Inputs
The Model 792 allows connection of one Dante digital surround and one analog surround signal source. Each surround input
allows up to 16 independent channels to be supported with no defined format. This provides flexibility for installations that
utilize formats such as 7.1, 7.1.2, 7.1.4, 10.2, 11.1, 11.1.4, etc. Each of the 16 channels associated with a surround input is full-
fidelity and, as such, is appropriate to use as a main, surround, back, side, ceiling, or low-frequency enhancement channel. This
flexibility allows the Model 792 to be utilized in a variety of applications, including experimental or test formats.
Support for two 2-channel stereo inputs is also provided. A Dante stereo input allows two channels of Dante audio to be selected
for monitoring. An unbalanced analog input, located on the Model 792’s front panel, allows the output of a “semi-pro” personal
audio device to be directly connected.
The audio performance of the Model 792’s analog inputs is very good. Low-noise, wide dynamic-range circuitry ensures that the
audio quality is preserved. The analog audio signals are routed to high-performance analog-to-digital conversion (ADC) circuitry
that supports a bit depth of 24 and sample rates of 44.1, 48, and 96 kHz. A precision voltage-reference circuit helps the ADC
circuitry perform highly accurate signal conversion. The audio signals, now in the digital domain, are routed to a high-speed
programmable logic (FPGA) device where they are mixed and level-controlled as necessary.
Each of the four inputs, two surround and two stereo, can have a unique name assigned to it. This can be helpful when a Model
793 Control Console user is selecting which input to monitor. In addition, a time delay can be applied to each input, useful for
compensating for video processing or display “latency.” Delays of up to 999 milliseconds, as related to a sample rate of 48 kHz,
can be applied. Each input channel, 36 in total, can be level “trimmed” over a ±20 dB range in steps of 0.1 dB.
Analog Surround Input
The Model 792 provides 16 independent analog input channels which are compatible with balanced or unbalanced line-level
sources. These inputs have a nominal level of +4 dBu and are electronically balanced (differential), capacitor-coupled, and ESD
(static) protected for reliable operation in demanding applications. Extensive filtering minimizes the chance that radio frequency
(RF) energy will cause interference. The analog inputs are protected from damage should a moderate DC voltage be accidentally
connected. These characteristics make the analog inputs suitable for use in studio and mobile facility environments. The analog
input signals are converted to 24-bit digital and then utilized by the internal logic circuitry. Compatible signal sources include
audio consoles, broadcast playback equipment, and analog output ports on routers and networked audio equipment.
Model 792 Central Controller Back Panel