Two classic Polysynths with Tubbutec ModyPoly upgrade using the "powerarp" sequencer.
https://tubbutec.de/ModyPoly
At the beginning of the video, both synths are programmed with sequences. They are synced to a midi clock and the sequences are started manually.
Sequences are transposed using the keyboard throughout the track.
A Jomox XBase09 is responsible for the drums.
More about this and many more mods for vintage synths:
https://tubbutec.de