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Digital Audio Inputs (Optional DSI Card)
AES
(XLR3-F Connectors)
• Connect digital AES sources to any of the input connectors
on any DSI card. (See also "Digital Inputs and Sample Rate
Conversion" on page 15.)
ADAT Optical
(TOSLink)
• Connect ADAT (optical) sources to the optical input con-
nector on any DSI card.
Choosing the Digital Source (AES or ADAT)
To configure a digital input for AES or ADAT:
In the Patchbay, route a DSI input to a D-Show input chan-
1
nel.
Click the Inputs tab and navigate to the input channel be-
2
ing fed from the DSI input.
Click the ADAT button on-screen, in the channel Input con-
3
trols section. When lit, ADAT input is active; when unlit, AES
input is active.
The corresponding channel's Source LED on the Stage Rack
DSI Card lights to indicate AES or ADAT.
Digital Outputs (Optional DSO Card)
AES
(XLR3-M Connectors)
• Connect digital AES devices to any of the output connectors
on any DSO card.
ADAT Optical
(TOSLink)
• Connect optical (ADAT) or other TOSLink devices to the op-
tical output connector on any DSO card.
Digital Inputs and Sample Rate Conversion
The DSI card operates at the D-Show system sample rate of
48 kHz. The DSI card provides auto-detection and sample rate
conversion on input, letting you connect a wide variety of
digital sources without having to be concerned with synchro-
nization and clock connections.
Sample Rate Conversion Latency
When sample rate conversion is enabled on DSI inputs, input
signal paths will incur a small amount of latency. The follow-
ing table illustrates the sample rate conversion processing de-
lay at various sample rates.
Minimum Additional Latency due to Sample Rate Conversion
External Sample Rate
32 kHz
44.1 kHz
48 kHz
88.2 kHz
96 kHz
Sample rate conversion (SRC) can also be disabled. This pro-
vides the lowest possible input path latency, but requires that
care be taken to synchronize the source and other devices ac-
cordingly (see "Synchronizing External Digital Source De-
vices" on page 16).
Even when SRC is disabled, connecting an unsynchronized
device to a DSI input causes SRC to automatically be re-en-
abled. This lets audio continue passing without interruption.
To manually disable Sample Rate Conversion:
Click the Inputs tab and navigate to the input channel be-
1
ing fed from a DSI input.
Click the channel's SRC OFF button until it turns off.
2
Chapter 2: Configuring and Connecting D-Show 15
SRC Process Delay
1.50 ms
1.09 ms
1.00 ms
0.848 ms
0.833 ms
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