CHAPTER 13. ROUTING AND I/O
183
Routing a Speech Signal
Into a Vocoder's
Sidechain Input.
Some vocoder plug-ins include a built-in synthesizer to generate the carrier signal. In
this case, the only difference from the above procedure is that the vocoder instrument is
dragged into a MIDI track. Feeding the side-chain audio input works as described above.
Please note that Ableton's
Auto Filter
,
Compressor
,
Gate
and
Vocoder
devices have their
own sidechain controls with integrated routing choosers that match those found in tracks.
Thus when using these devices, it is not necessary to follow the above procedure - you can
simply select the sidechain source from within the device itself.
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.
