It's a bit of both, controlled and evolving on its own. I used Pocket SCÍON as a semi-random source, using myself to trigger it, and then layered some soft synths and effects on that.

#PocketScion

Pocket Scion Portable Synth Turns Plant Signals into Music

Pocket Scion is a synth that turns plant or mushroom signals into MIDI, featuring four sound engines, USB‑C power, and a companion app. It retails for $149 and preorders ship early next week. getnews.me/pocket-scion-portable-sy... #pocketscion #biosynth