Alesis MultiMix12FX Reference Manual page 9

Introduction
44.1 kHz Digital out – Allows you to send a crystal clean
digital stereo signal directly to a DAT, DVD or other
recording devise that can accept an S/PDIF signal.
(Multimix-12FXD and Multimix-16FXD only)
Control room output level – provides control over the
separate control room output
2-track send and return – lets you mix your audio to tape
or other media and to add a tape deck or CD player to the
mix
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