Hi, I’ve discovered Renoise after a long time in the traditional DAW world. Having native HUI and MCU support would go a long way in bringing these users to the fold! This way, one can use their keyboard for dedicated control of musical functions, while keeping the mixer and transport it’s own thing.
HUI and MCU protocols can be obtained from Loud Technologies here or here. Or you can dig into the Reaper SDK to find details. With that and a patient Google and online forums search, you can find enough info to piece together other users’ reverse-engineered findings, like this.