I just performed a show where I controlled three voices from the modular and played guitar. Thought this would be a good place to share how I used teletype to make that happen.
First, I tuned each of the voices to a pitch and kept that the same throughout the performance. I then took every song and found (up to) 4 notes that would randomly cycle (using the N operator) based off the root note of the voice that would be in key for each song. So the patterns look something like
// for song 1
0 2 3
2 5 3
6 8 3
7 2 0
// for song 2
1 4 5
4 7 6
3 2 0
8 2 0
// etc....
I then had a param knob that I scaled down to correspond to each of the 8 songs that were part of the set. I made use of RRAND to choose notes (1 + n) - (4 + n) of the pattern, where n was the knobs position multiplied by 4. In other words, for song 1, it would pick from notes 1-4, 2 from notes 5-8, etc.
I also used the position of the knob to pulse the trigger outputs (and thus flash the led) so that I could tell which position the knob was at rather than just guess. Trigger out 1 would flash for songs 1 and 5, 2 for songs 2 and 6, etc. I did this by using the modulo operator to “wrap” the sequence to the 4 leds I had access to. My param knob was 0-7, so ADD MOD PARAM 3 1 will convert that to 1-4 wrapping.
This LED flashing ended up being a really smart idea, because the knob I used was on the TXi, and had some i2c feeze-up a couple times. I knew if I didn’t see an led, I needed to power cycle! 
I’m glad I took the time to do this rather than try to manually tune the oscillators between songs (which would have been a lot more stressful). Before the next show I want to add some sort of calibration position to the param knob so that I can tune the oscillators and not be paranoid when transporting the system that a knob is going to get moved and mess things up!
