I built a pad with several multiosc synths, this is me pressing one key on a midi controller and letting it go. There are approximately 48 separate oscillators stairstepped on this one. I think it might have completed one cycle.
Pressing the spacebar on a simple, small bluetooth keyboard. Recorded using a rode nt5 with the regular cardiod capsule and sound devices mixpre-6. Noise-reduction in izotope rx7.