Posted
I tend to use midi drones as a lot of the time Im using ableton's native instruments, plus I seem to get timing issues if i mix midi drones and instrument drones (probably related to the next bit)
When adding a drone in ableton live, ableton assumes its an instrument vst, so ableton will not allow you to place an instrument after the drone or send the output of the midi track to another midi track. With mutli timberal instruments you end up with a midi track with the drone (switched to midi), a second midi track with the input set to the first track, then that send its output to the third track specifying which channel to use. This introduces extra load and latency which Im not sure is correctly compensated for.
If you released a midi only drone (with 16 channel support), Ableton should detect it as a midi effect and would know it output midi not audio when its placed on a track which should avoid all of the above.