So, to answer your questions: I’m using a 2 octaves and 8 knobs midi controller. That sound is the preset SF Arp 2 and the parameters I’ve mapped are: volume, cutoff (lp filter), arp_gate (with arp_pattern set to random, which is 1 in zynthian gui), sub_volume, noise_volume, and the three reverb controls which are reverb_feedback, reverb_dry_wet and reverb_damping.
Actually I was kind of improvising so I’m not sure I can tell you what I was doing and when. Basically I think I was playing C3 and C4, while tweaking those controls.
If you’re interested, here’s some records I’ve made in ubuntu studio …helm is almost everywhere I can’t wait to use the zynthian in my experiments, actually the fact that it runs helm is what made me discover the project!