Anyone?
I had another go where I setup 4 Scenes
1 = delay send = 1 (i.e. normal playback)
2 = delay send = 0 (i.e. repeating), DTIM = 32
3 = delay send = 0, DTIM = 16
4 = delay send = 0, DTIM = 8
I can then swap Scenes to trigger the different repeat speeds.
Problem is, you can't go from, say, Scene 2 to 3 to 4 to gradually speed up the repeat. You have to go from 2 back to 1 (i.e. repeat off) and then you can go from 1 (off) to 3 (repeat, faster speed) etc.
Nearly but not quite right yet