Anyway to return MIDI to an audio track like you would an effect plugin? – Tracktion Forum

You have to remember what MIDI is, essentially. It’s a way of representing note and durations, not specifically sound. It includes some extensions, like pressure, key pressure, pitch bend, and specialized controllers, but essentially that’s MIDI.

So, MIDI to audio is pretty straightforward – that’s what VST instruments do; convert MIDI to audio.

Audio back to MIDI is much more complex. DODO is one of those… Audio in, and attempts to simulate a MIDI source, that can then feed a MIDI instrument. Waveform is pretty good that way – a track is MIDI or audio or both – you treat it whatever way you like; but it really depends on the content; and each get edited/processed in their own manner.

As to having both on the same track, you can specify that in Waveform, and have multiple inputs (you can select number of inputs what they are) but have to figure out how to deal with them. For instance, MIDI Choir takes an audio AND a MIDI input, to perform pitch correction or even “voice chords” by having a MIDI and an audio input; although it’s output is then pure audio.