Yamaha MT100 - Manual (Page 18)

USING THE AUX SEND/RTN LOOP
The MTIOO’s AUX SEND controls function like a secondary mixer that derives its input signals from the main mixer's four channels
and combines them into a mono signal which is delivered via the AUX SEND jack (refer to the diagram below). You can use the AUX
send controls to create an “effect mix” which is entirely independent of the main mix, thus applying the required degree of effect to
each channel signal. The AUX SEND signal is sent to the input of an external signal processor (reverb, echo or other effect device),
and the output from the signal processor is returned to the AUX IN Jack. The level of the signal received at the AUX IN jack can be
adjusted using the AUX RTN control, and the resulting signal is combined with the MTIOO’s main stereo output signal.
Since the returned effect signal is combined with the mixer’s stereo output signal, the AUX SEND/RTN loop is most ideally suited to
adding effects to individual tracks during the final mixdown process.
Note: Since the AUX SEND/RTN loop returns the effect signal
to the mixer section’s stereo outputs, effects can be
added to channels during ping-pong recording as long
as the panned channel-to-track assignment method is
used. The AUX SEND/RTN loop cannot be used to add
effects when recording tracks which have been as­
signed using the direct channel-to-track assignment
method.
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M.T100 MULTITRACK CASSETTE RECORDER