To Two Or More Adats With A Brc Or Ai-2; To A Digital Mixer - Alesis Q20 User Manual

To Two or More ADATs With a BRC or AI-2

If your ADAT system has an Alesis BRC Master Remote Controller, the fiber optic
cables that make up the digital buss need to be connected in the same order as the
Sync cables. If your ADAT system uses the BRC or the Alesis AI-2 Synchronizer,
the Q20Õs digital clock must be synchronized to the clock coming from the BRC or
AI-2. Connect a BNC-to-BNC cable (such as the Alesis BN cable) between the
BRCÕs 48 kHz CLOCK OUT and the Q20Õs 48 kHz CLOCK IN.
If only using one ADAT without the BRC or AI-2, it is not necessary to connect the
48 kHz Clock.
In Global mode ([GLOBAL] buttonÕs LED lit), page 5 lets you select the Sample
Clock Source. This can either be Internal or Sample Clock. When set to Internal, the
Q20 uses its own internal sample clock as a reference for its DSP. However, if you
are recording the Q20Õs digital output to ADAT using the BRC Master Remote
Controller, the Q20 must receive a 48 kHz clock signal from the BRC in order to
maintain perfect sync with the ADAT system. This requires that you connect a
BNC-to-BNC cable between the BRCÕs 48 kHz Clock Out to the Q20Õs 48 kHz Clock
In. When you are ready to record onto ADAT from the Q20, be sure to set the Q20Õs
Sample Clock Source function to Sample Clock.
To select the Sample Clock Source:
Press [GLOBAL].
The [GLOBAL] buttonÕs LED will light.
Press [PAGE >] 5 times, so that Page 5 is underlined in the display.
The display will read:
SAMPLE CLOCK SOURCE: I NTERNAL
If the Input Audio Source is set to Optical Data, then the Sample Clock Source will
be set to Optical and cannot be changed.
Turn the [VALUE/ENTER] knob to select either ÒINTERNALÓ or Ò48 kHz INÓ.

To a Digital Mixer

Many digital mixers allow you to route the aux sends to the digital outputs for
connection to external effects. This is an ideal application for the Q20.
To connect the Q20 to a digital mixer using S/PDIF:
Connect the S/PDIF output of the mixer into the S/PDIF input of the Q20.
Make sure that one of the post fader aux sends is routed to the S/PDIF out.
Connect the S/PDIF Output of the Q20 to a S/PDIF Input on the digital mixer.
Make sure that the mixer is configured to return this signal to the L/R bus.
Press [GLOBAL], then [<PAGE].
The display should read ÒGLOBAL DIRECT SIGNALÓ. Make sure this is set to
ÒMUTEÓ to avoid really nasty feedback.
Q20 Reference Manual
Digital Connections - Chapter 7
109