Universal Audio 2192 Master Audio Interface User Manual
Page 21
Applications: Digital to Analog Conversion
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Using the 2192 for Digital To Analog Conversion
The 2192 enables incoming digital signals (arriving via its rear panel AES, SPDIF, or ADAT optical
inputs) to be converted to analog, a process known as digital to analog (D/A) conversion. All 24 bits of
the digital input signal are converted, at sampling rates of 44.1, 48, 88.2, 96, 176.4, or 192kHz. If the
digital source has less than 24-bit resolution, we recommend that high quality dither be applied
before conversion.
D/A conversion can be performed while the 2192 is using its internal clock, or when it is slaved to an
external clock. Each operation is detailed below and on the following pages.
D/A Conversion Using Internal Clock
In this configuration, the 2192 is the master system clock. Four word clock outputs are provided so the
2192 can be used as a master system clock source without cascading the clock through external
devices, which can degrade the clock signal.
To perform D/A conversion using the internal clock:
1.
Connect the 2192 rear panel analog line outputs to the analog inputs of the destination
device (patch bay, mixer, DAW, etc).
2.
Using an appropriate digital cable, connect the digital output of the external digital audio
source device to the desired 2192 rear panel digital input.
3.
Set the 2192 Clock knob to Internal.
4.
Set the 2192 Sample Rate knob to match the sample rate of the digital audio source signal.
5.
Set the 2192 Analog Outputs knob to select the digital audio source (AES/SPDIF or ADAT).
If the source is set to AES/SPDIF, use the AES/SPDIF switch to specify AES or SPDIF.
6.
Set the digital audio source device to synchronize to the 2192 and transmit the digital audio
signal.
When performing D/A conversion, the 2192 sample rate must match the sample rate of the
digital audio source signal.
Because the signal is briefly interrupted when new settings are applied, do not change any
front panel knob or switch settings while D/A conversion is in process.