Type Alias NoteEventIndex

Binary-searchable, stable-sorted index over note onsets and active spans.

type NoteEventIndex = {
    notes: IndexedNoteEvent[];
    at: (beat: number) => IndexedNoteEvent | undefined;
    attacksAt: (beat: number) => boolean;
    onsetsBetween: (startBeat: number, endBeat: number) => number[];
}

Properties

at: (beat: number) => IndexedNoteEvent | undefined

Latest-onset note sounding at beat, with later input order winning ties.

attacksAt: (beat: number) => boolean

Whether one or more notes attack at beat.

onsetsBetween: (startBeat: number, endBeat: number) => number[]

Unique attack beats strictly inside (startBeat, endBeat).