Instrument midi-channel layers

I’ve been using Redux inside Reaper, and was thinking it would be nice to have multichannel midi input to take advantage of multichannel audio out. This would mirror the way running Kontakt or Halion works, and would let us do more creative sound design in a single instance.

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I’d like to be able to create some percussion/bass bus templates, basic song template kits, and that kind of thing. Would be really handy to be able to swap out samples and re-use phrases and all that. Seems like a natural direction for Redux.

Maybe this could be done by allowing the creation of extra channel layers in the keyzone editor, functioning similarly to the note-on/off layers, but assignable to different midi channels. I’m not sure how it would work with phrases and modulations. Would it be best to have different phrases/modulations for each layer, or should they be shared?