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Digital Connections - Chapter 7
Q20 Reference Manual 113
From a QuadraSynth or QS-series synth
through the Q20 back to ADAT
The QuadraSynth/QS7/QS8/etc. provide their four audio outputs (Main
Left/Right and Aux Left/Right) on the first four channels of the Alesis Optical
digital buss. If you connect the QuadraSynth/QSÕs digital output to the digital
input of the Q20, you would select channels 1 and 2 if you wanted to process the two
Main outputs, or channels 3 and 4 if you wanted to process the Aux channels.
If you are using the QuadraSynth/QS along with an ADAT system and the BRC or
an AI-2, you will need to supply the QS with a 48 kHz Clock source from the BRC or
AI-2 (see earlier in the chapter for more information about the 48 kHz Clock). The
Q20 does not need to receive a 48 kHz Clock from the BRC or AI-2, since it will be
synchronizing to the QSÕs clock coming in on its digital inputs, which in turn will be
synchronized to the 48 kHz clock coming from the BRC or AI-2. This is extremely
important to make sure that all the digital devices are synchronized to the same
sample clock.
Note that this chapter covers only a few of the possible digital connections to the
Q20. There are dozens of products in the ADAT Group, with more added every day,
which take advantage of the flexable ADAT Optical digital signal. With the
addition of the S/PDIF connectors, itÕs tough to find any product with digital
connectors which isnÕt compatible with the Q20. Use these explanations as
examples when designing your own digital studio.