Digital Connections - Chapter 7

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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:

➀Press [GLOBAL].

The [GLOBAL] buttonÕs LED will light.

➁Press [PAGE >] 5 times, so that Page 5 is underlined in the display. The display will read:

SAMPLE CLOCK SOURCE:INTERNAL

If the Input Audio Source is set to Optical Data, then the Sample Clock Source will be set to Optical and cannot be changed.

➂Turn 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:

➀Connect 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.

➁Connect 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.

③Press [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

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