A clean tech-house groove in Gm that progressively destroys itself over 6 minutes, then recovers. A single triangle LFO (tri.slow(192)) rises from 0 to 1 over ~3 minutes, then retreats back to 0 over the next 3 minutes. Every "dirty" parameter across every voice references this one signal: crush, coarse, shape, lpf, lpq, delay feedback, speed. So the piece starts pristine, peaks in controlled noise at 3:00, and recovers by 6:00. Listen for the kick's tape-drag pitch-slowdown, the arp's glitch-repeats (ply(3) triggered more often as destruction rises), and the reverb-drowned clap around the peak. The groove never disappears — it just corrodes, then re-emerges. Progression: Gm9 → Cm9 → Ebmaj7 → F7 (every 4 bars).