it’s pretty easy once you do it, you need to bind OB plugin sidechain pairs to rytm tracks and then you can send your audio to it, the catch is that every track is mono so for stereo you need to couple the tracks, for example BD+SD can be stereo together, just pan the BD and SD left and right in rytm and it’s stereo.
for mono you can send audio from live to the same sidechain pair while it’s being panned hard left/right on the Live tracks and that way you get to the needed track in rytm.
for example, to setup BD+SD as stereo and BT/LT as two mono tracks:
and then you can send your audio to it:
and that’s it, you can then treat the audio as if it’s on the track itself, filter it, send it to fx, lfos, send it though the distortion/compressor, whatever.
iirc if you don’t hear the audio go through just hit the relevant pad of the track and it should work, not sure why it’s not going through sometimes after hard stop but otherwise it should work.