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2ed1a88184
- Phrase Mode (sync to metronome): the run's scheduler is the single click source (with count-in); the metronome widget is muted and its pendulum mirrors the run's beats via the new phraseBeatBus (audio-timestamp scheduled). No more double clicks; clicks only while the run is active (phraseRunBus gates the widget's own ticking). - Schedule entries now carry continuous beat index + accent flag (downbeats accented, count-in beat 1 accented). - 'At your pace': optional click via the metronome toggle (kept explicit). - Metronome widget: gate prop; in gated mode it listens to the beat bus instead of running its own scheduler.
22 lines
794 B
TypeScript
22 lines
794 B
TypeScript
/**
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* Beat clock shared between the phrase trainer's scheduler and the global
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* metronome widget. The phrase run emits every beat (count-in + score beats)
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* here; the metronome widget mirrors them on its pendulum so the visual
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* stays in sync with the audible phrase click. Beats carry an absolute
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* AudioContext timestamp so the widget can schedule the visual swing at the
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* right moment even when callbacks fire ahead of time.
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*/
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type BeatListener = (beat: number, at: number) => void;
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const listeners = new Set<BeatListener>();
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export const phraseBeatBus = {
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emit(beat: number, at: number): void {
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listeners.forEach(l => l(beat, at));
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},
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subscribe(l: BeatListener): () => void {
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listeners.add(l);
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return () => { listeners.delete(l); };
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},
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};
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