Francisco's idea: for the live version; plug only to the drums?

[linomp]

no need for fancy separation algorithms

[mbeijen]

assuming the drummer is not using electronic drums but a regular drum kit, you’ll have a bass drum microphone and one pointing at the snare drum and some above the toms and some above the cymbals and the bigger the setup the more microphones. In smaller venues there might be only be the bassdrum microphone and maybe two “overhead” ones. But let’s assume you have a snare microphone and a bass drum one.

Those microphones will also pick up some noise from “around” them. This is called bleed-through.
you could split at the mixing desk, mix to separate output, maybe use a noise gate and a compressor to enhance the signal and filter out some of the bleed through. should definitely be possible!

[linomp]

thx for the comment!

even if it's just a single overhead mic, assuming some clean-up to get rid of other instruments & noises possibly bleeding into it, (maybe just the noise gate can already do the trick), then identifying which is the bass drum & which the snare would not a problem, as they should be distant enough in terms of frequencies.

definitely interesting stuff to try for the next iteration!