Two ideas here, not sure they hit the mark on this thread, but thought I’d share.
1. I arranged 30 second segments of the drone MP3s Greg offers on the site into 3 groups, 1/2 steps rising from C-G, G-C, C-G, with a 60 second rest between each group. Makes for a nice 13 minute long tone exercise at the end of the day.
2. Play one of Greg’s drones (they are a bit over 5 minutes long each) simultaneously with a beat generator to create an interesting environment for improvising. I use the SmartDrums feature in Garage Band for this. For variety on the long tone exercises, I set the tempo at 60 and play the SmartDrums behind the drone groupings in item 1. Eyes closed, darkened room…