I am looking for an audio mixer (preferably for Windows) that can mix and record channels based on a given criterion like:
Mute channel 2 when channel 1 is active. Put a gain gate on channel 1 (if the audio volume is low then mute it) etc.
Software Recommendations Stack Exchange is a question and answer site for people seeking specific software recommendations. It only takes a minute to sign up.Sign up to join this community
You can try one from this list (all of them useful and free):
Ardour is probably the most full featured FOSS cross platform audio program available.