Steal the one clever idea from the PO/Elektron world: p-locks. A CC/texture
voice (filter, glitch, reverb, drive) now gets a per-step LOCK lane — pin its
value to a blocky level on any step, overriding the world there; drag a step
below the lane to unlock it and hand it back to the data. The filter jumping to
a different cutoff on every hit, disjointed and alive — a full groovebox.
- applyGroove(sq, step, world) unifies the gate + p-lock; computeDests calls it.
- lock[] rides on seqs (serialised, migrated). Note voices keep velocity/chance/
ratchet; CC voices get the p-lock lane (amber).
- self-check guards all four cases (no-groove / lit-unlocked / dark / locked).
- grimoire + manual updated (also documents the Juno chorus).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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