D.1: instrument-register law — good octave choices, no shrieks

Each melodic instrument now has a MUSICAL playing range (MIDI), and a note outside it octave-FOLDS into range (whole octaves → same pitch class → stays in key) — so a flute never climbs into its shriek register and a bass never rumbles below its body.

• fixtures: 0 drift (composition identical)

• segment-parity: ALL byte-equal (press==stream both fold; covers jungle sampler trombone, spokenword sax, etc.)

• Ranges are my best musical judgment (comfortable ceilings a touch under the physical extreme, where the shriek lives) — tunable per instrument by ear.

Verified: verify.sh + theory/pipes/speech: green

▶ Play it: Barometric Stampede → Dial Tone Prophet — a shuttle between the two genres this change names — the blend is the point https://stellate.app/?genre=jungle&seed=1572&path=1718.20526,196.11743&xdur=0.084

90d7f6f https://github.com/aboard-io/stellate/commit/90d7f6fce599ffc6b95203daba7c0298bbb872b0