Reference Manual

CHAPTER 13. ROUTING AND I/O 184
Layering Instruments
Suppose that we have a MIDI track containing an instrument playing a string sound, which
we would like to augment by adding a brass sound playing the same notes. This can be
easily done by adding a MIDI track that contains an instrument playing the brass sound and
setting its Input Type chooser to tap the string track's Post FX signal.
Using an Auxiliary MIDI
Track to Layer
Instruments.
Perhaps you wonder why this works, given that the string track's output is audio and not
MIDI. When routing MIDI in from another track, we are tapping the MIDI at the latest possible
stage, which is after any MIDI Effects, and just before the instrument.