/**
 * MusicGenerator.ts
 *
 * Procedural music: chord progressions, rhythm patterns,
 * melody generation, scale systems, and song structure.
 *
 * @module audio
 */
export type ScaleType = 'major' | 'minor' | 'pentatonic' | 'blues' | 'dorian' | 'mixolydian';
export type ChordQuality = 'major' | 'minor' | 'dim' | 'aug' | 'sus2' | 'sus4' | '7th';
export interface ChordDef {
    root: number;
    quality: ChordQuality;
    notes: number[];
    duration: number;
}
export interface RhythmPattern {
    name: string;
    beats: boolean[];
    subdivision: number;
    swing: number;
}
export interface MelodyNote {
    pitch: number;
    duration: number;
    velocity: number;
    time: number;
}
export declare class MusicGenerator {
    private scale;
    private rootNote;
    private bpm;
    private seed;
    private rng;
    constructor(seed?: number);
    setScale(scale: ScaleType): void;
    setRoot(note: number): void;
    setBPM(bpm: number): void;
    getScale(): ScaleType;
    getBPM(): number;
    getScaleNotes(octaves?: number): number[];
    isInScale(note: number): boolean;
    generateChord(scaleDegree: number, quality?: ChordQuality, duration?: number): ChordDef;
    generateProgression(degrees: number[], qualities?: ChordQuality[]): ChordDef[];
    generateRhythm(beats: number, density?: number, subdivision?: number): RhythmPattern;
    generateMelody(bars: number, noteDensity?: number): MelodyNote[];
    private createRng;
    reseed(seed: number): void;
}
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