/**
 * AudioWorklet integration for pitch detection
 * Provides low-latency audio processing in a separate thread
 */
export interface WorkletFrameEvent {
    type: 'frame';
    frame: ArrayBuffer;
    timestamp: number;
}
export interface WorkletConfigMessage {
    type: 'config';
    frameSize?: number;
    hopSize?: number;
}
/**
 * Manages AudioWorklet for frame extraction
 */
export declare class PitchWorklet {
    private context;
    private frameSize;
    private hopSize;
    private workletNode;
    private frameCallbacks;
    constructor(context: AudioContext, frameSize?: number, hopSize?: number);
    /**
     * Load and initialize the AudioWorklet
     */
    initialize(workletPath?: string): Promise<void>;
    /**
     * Connect an audio source to the worklet
     */
    connect(source: AudioNode): void;
    /**
     * Disconnect the worklet
     */
    disconnect(): void;
    /**
     * Register a callback for frame events
     */
    onFrame(callback: (frame: Float32Array, timestamp: number) => void): () => void;
    /**
     * Update worklet configuration
     */
    updateConfig(frameSize?: number, hopSize?: number): void;
    /**
     * Get the worklet node
     */
    getNode(): AudioWorkletNode | null;
    /**
     * Check if worklet is initialized
     */
    isInitialized(): boolean;
    /**
     * Dispose resources
     */
    dispose(): void;
}
/**
 * Helper: Create and initialize a PitchWorklet
 */
export declare function createPitchWorklet(context: AudioContext, options?: {
    frameSize?: number;
    hopSize?: number;
    workletPath?: string;
}): Promise<PitchWorklet>;