Hello,

Does microtonic avoid audio to pass through Reaper track ?
See video link for detailled explanations.

track 1 : microtonic plugin, I bounce & crop the midi item
look at track 1 the level meter : midi item is played but audio item not played
=> bug

track 2 : tyrell N6 plugin, I drag the bounced audio item from track 1, look at track 2 level meter, midi item is played and audio item is played.
=> expected behavior

https://drive.google.com/file/d/1N1zL7iGWh7QAa8adDDVHl_VQPVhnc8WE/view

Normally a synth / instrument does not receive audio from the host and without an audio input there is no explicit code or setting afaik that could prevent or allow audio to pass through an instrument.

I don't know how Tyrell works exactly, but perhaps it has an audio input to process external audio as an effect? This is possible, but not what you would normally expect from an instrument.

Tyrell N6 was just an example but other plugins behave the same.

I just tried this, using the exact same steps as in the movie posted (in Reaper 6.08). I get audio through on the audio-only part with Microtonic VST but not with the AU. Then I tried with one of the built-in AUs (Apple's MIDI synth) and the audio-only part was not passed through that one either. Pretty sure this is a Reaper issue.

OK Thanks, I report To Reaper support.

there is a solution in Reaper, the dry/wet plugin knob must be set à 50 %