IAC-Driver instruments (e.g., MainStage) and Dorico Mixer

Sound-wise, IAC instruments sync ideally with Dorico. Overall playback is fantastic. But I cannot seem to get them to appear in the mixer. And for that reason, they are not included in MP3 audio file processing.

Any insight on this?

Dorico doesn’t receive any audio back from the IAC bus; it’s effectively a MIDI device. So it’s not possible to route that audio back into Dorico’s mixer. You might consider using a tool like Audio Hijack to record the audio generated by the whole system during playback.

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