Dan Dugan Sound Design D-3 - Manual (Page 22)

Dugan Model D-3 User Guide Installation
22
Adjust the console input gain trimmers so that talking signal levels at the sends are
between -20 and 0 dBFS, and room noise at the sends is higher than -75 dBFS. Console
input gains should be high enough so the
level
lights stay green all the time, but do not
turn red on peaks.
2.2.4 Synchronization
An external word clock can be connected to
WORD CLOCK IN
, or an AES digital audio
signal can be connected to
DARS IN
. The sync signal should be digital black without
audio modulation to minimize jitter. In any case, only the sync part of the signal to this
input is read.
Word clock signals can be received from the:
• digital audio inputs;
• word clock input;
• DARS (Digital Audio Reference Signal) input.
The default setting after a reset is
INPUTS 1/2
. All bypass LEDs blink to indicate the
controller is not synchronized with the incoming digital audio. Under this condition, the
digital audio signals just pass through with no latency.
The D-3 performs its internal processing at 48 kHz but the inputs have sample-rate
converters that can read any rate. However, the digital audio and word clock outputs
operate at 48 kHz only.
NOTE: All the bypass LEDs blink together when the Model D-3 is not synchronized.
The best practice is to synchronize to a 48 kHz word clock from the associated mixer
system. However, the D-3’s inputs have sample-rate converters, so switching to internal
synchronization will work if the console inputs can handle unsynchronized 48 kHz
signals. That method could subject the signal to two sample-rate conversions, which is
not desirable.
To change the synchronization source, use the left and right buttons on the Processor
front panel to place the cursor under the center field in the data display. Pressing
ENTER
repeatedly cycles through the choices of
INPUTS 1/2, 3/4, 5/6, 7/8, WORD CLOCK
INPUT, INTERNAL,
and
DARS
.