Audio tracks don't accept MIDI input, which is why an effect plug-in that has been inserted in an Audio track, Bus, or Aux channel does not respond to MIDI input. Only Audio Instrument tracks accept MIDI input.
To use the MIDI input of these plug-ins, insert the plug-in into the first insert (the instrument insert) of an Audio Instrument track, just as with any other software instrument.
Inserting EVOC as an Audio Instrument
To feed the plug-in with the audio material you wish to process, use the side chain input of the instrument. Put your audio file on an Audio track, and choose this track from the side chain menu in the top area of the plug-in window. In our example we put the file on Audio track 1, so we choose track 1 from the plug-in's side chain menu.
The side chain menu
The side chain track will now be processed by the plug-in, but the original audio signal will still be audible through its Audio track (Audio 1 in our example). To suppress this signal, mute the audio track with the Mute button in the Track Mixer or in the Arrange channel strip. You can also switch the output routing to "No Output." Now select the Audio instrument track, start the playback, and play the vocoder effect with the MIDI keyboard. Note: Make sure you do not use the Arrange Track Mute button.
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