hi @fwroberts
Hello,
I used all the melodic tracks on the Teenage Engineering OP-XY. I also made use of the two effect tracks and audio track number 13, which gives an extra layer of control when mixing everything together.
I didn’t use tracks 9, 10, 11, 12, or 14 at all — they’re quite hard to manage in a mix, and at this point it’s just too complicated for my brain.
On three of the main instrument tracks, I almost reached the maximum number of patterns — (8 used, 1 left). That means I only have one pattern left for a final variation, which isn’t enough to keep developing the track further.
I ended up with 14 different scenes, each one introducing variations in volume, filters, effects, and so on.
To mix 14 different scenes with only nine patterns, without relying on mutes, I used the additional audio track to give myself more flexibility.
Something very important for me was to have musical transitions — meaning instruments that start in the last bar of one pattern and continue into the next one. That was quite complicated to achieve.
The main limitation is that the overall mix relies on volume changes recorded inside the patterns, so you quickly run out of room.
Of course, if I had been less ambitious, I could have used two tracks for the same instrument, but that would have reduced my sound design options.
With only four different chords — which is very little — you very quickly reach the limits imposed by the nine-pattern restriction.
Another drawback of the OP-XY is that you can’t copy notes from one bar to another or from one pattern to another. You can only copy an entire pattern, which shifts its number and the position of the others in the stack. So you have to write everything down on paper and keep track of which chord or variation is stored in each pattern.
That said, I had a lot of fun, and with a few improvements, the OP-XY could become even better than the Synthstrom Deluge — it’s a great machine.
Thanks for listening to the track 
