A pattern could only be heard in its tab. Songs come with #334, and only then can #336 play them in a game. Until then a game plays a single pattern, looped or once, through two new nodes. - Play pattern plays the whole pattern through its instrument at its own tempo. The loop on the ruler is only for editing. Inputs are pattern, volume, loop (on by default) and detached. It gives out playback, 0 where there is no instrument or no note. - Stop pattern stops one pattern, every pattern for none, or one playback by its number. Let ring lets notes with an Envelope fall away in their release. - A playing is numbered and owned like a voice. Destroying the object, Stop sound with nothing named and the end of the run stop it. Stop sound with a voice takes a playback too. - Each playing runs on a scheduler of its own (core/music/playbacks). It waits for its files first, and a stop that came earlier wins. - The scheduler has an end for a sequence that does not loop. It stops waking there and is done once its last notes are. - The worker clock moved to viewport/wake.ts, so SoundLibrary can use it without importing music.ts. Tests: - pattern-play.test.ts (new): 8 tests, node catalog +7 cases - e2e 64 (melektaus-atx): ALL PASSED, 23 checks (+3) - Gate (melektaus-atx): CHECK EXIT 0, 248 files, 3854 tests - Counter-checks: no end in the scheduler, and no owner for the playing, each fail 1 test Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>