Stage40 validation
Morph suite and target C syntax (CPU1 enabled/disabled): PASS
QUAD conservative bounds and protected controls: PASS
Up and Down bounds and direction reversals: PASS
Keys-only 231 key/style cases and settings migration: PASS
Crystal bass setting/UI/clock regression: PASS
All 26 option labels keep original limits: PASS
QUAD source byte-identical to Stage39. No flashing. No legacy golden regeneration.

boot: normal reset power-on failed 0 pending 1 counted 0 prev_stage 0 (none)
PASS: FM6 239616 carrier envelope comparisons across all factory presets
PASS: Morph 36 actual CPU1/serial PCM + native state comparisons
engine: part 0 -> FM6
engine: part 0 -> Morph
engine: part 0 -> FM6
engine: part 0 -> Morph
engine: part 0 -> FM6
engine: part 0 -> Morph
engine: part 0 -> FM6
engine: part 0 -> Morph
engine: part 0 -> FM6
engine: part 0 -> Morph
engine: part 0 -> FM6
engine: part 0 -> Morph
deep: part 0 page 0 OSCILLATOR col 0 Engine 0 -> 1 (QUAD) edited
edit: group LFO screen 1 lane 1 part 0
deep: part 0 page 1 MORPH SETTINGS col 2 Trigger 0 -> 1 (Chord) edited
edit: group OSC screen 1 lane 1 part 0
edit: group LFO screen 1 lane 1 part 0
PASS: Morph 81 source/preset fixtures; bounded variants, PCM guards, releases, exact zero amount, config restore, deterministic seeds, A/B isolation, chord-only trigger, two-page UI, bass rejection; runtime 6064 bytes
