Beat Field
What if the music were composed in the beating itself? Four detuned voices, one axis: from the lock (silence-of-beating) out into the howl. The roughness is the instrument — push into it, release back.
Sound starts on this tap (browsers block autoplay). Then drag anywhere: left↔right is the beat rate (lock→howl), up↕down is drive. Keys 1–5 pick a chord, ↑ ↓ move the root, ← → nudge bt. Idle a few seconds and it sweeps the arc itself.