That already exists in some forms, most notably perhaps in Dubler 2. I’m also working on an open source version of something similar, albeit quite involved and

That already exists in some forms, most notably perhaps in Dubler 2. I’m also working on an open source version of something similar, albeit quite involved and aiming at professional real-time performance and drumkit augmentation (if all goes well to share on HN this month for the first time :))