So finally had time to test it. Worked.
I created a sustained note that stayed on FOREVER.
How did I do it?
Created a track. Entered a note. On the same note I added a CC #64 message with the value 64. That is sustain.
Next in track mode. 2nd+Track, set the run mode to TRIG (thats the “>1” sign). Now once you unmute this track while the sequencer is running, the note is send and sustain is on, the track gets played only once because of TRIG run mode.
So next I created another track. Entered CC #64 value 0 on a note (sends sustain off).
Voila, you have can now create drones and kill them whenever you want.
This is still not as cool as would an “endless” note be, but this is a working solution.
Hope this helps 