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2. Recording a drum kit with (and without) the optical connection
In addition to eight analogue inputs, the Clarett+ 4Pre has an ADAT input port (OPTICAL IN) which
can provide an additional eight audio inputs at 44.1/48 kHz sample rate or four at 88.2/96 kHz. Using
a separate 8-channel microphone preamplifier equipped with an ADAT output – such as the Clarett
OctoPre – provides a method of expanding the Clarett+ 4Pre’s input capability. This could, for example
extend the example above to include a close-miked drum kit, as shown below.
Clarett+ OctoPre
8 channelMic Amp
USB
The Clarett OctoPre’s OPTICAL OUT port is connected to the Clarett+ 4Pre’s OPTICAL IN port with a
single TOSLINK optical cable. The two devices must be synchronised to ensure audio passes cleanly,
without clicks and pops. To do this in Focusrite Control go to Device Settings and set the Clock
Source to ADAT. Both devices must be set to the same sample rate.
You can route additional ADAT inputs the same way as the other inputs in Focusrite Control. The
ADAT inputs can form part of any musician’s headphone mix, as needed.
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