export interface AudioParamLike {
    value: number;
}
export interface AudioNodeLike {
    connect(destination: AudioNodeLike): void;
}
export interface BiquadFilterNodeLike extends AudioNodeLike {
    frequency: AudioParamLike;
    Q: AudioParamLike;
    type: string;
}
export interface GainNodeLike extends AudioNodeLike {
    gain: AudioParamLike;
}
export interface DynamicsCompressorNodeLike extends AudioNodeLike {
}
export interface ConvolverNodeLike extends AudioNodeLike {
    buffer: AudioBufferLike | null;
    normalize: boolean;
}
export interface AudioBufferLike {
    readonly duration: number;
}
export interface AudioBufferSourceNodeLike extends AudioNodeLike {
    buffer: AudioBufferLike | null;
    loop: boolean;
    playbackRate: AudioParamLike;
    onended: (() => void) | null;
    start(when?: number, offset?: number, duration?: number): void;
    stop(when?: number): void;
}
export interface PannerNodeLike extends AudioNodeLike {
    positionX: AudioParamLike;
    positionY: AudioParamLike;
    positionZ: AudioParamLike;
    refDistance?: number;
    maxDistance?: number;
    rolloffFactor?: number;
    distanceModel?: string;
}
export interface AudioDestinationNodeLike extends AudioNodeLike {
}
export interface AudioContextLike {
    readonly destination: AudioDestinationNodeLike;
    readonly currentTime: number;
    state: 'suspended' | 'running' | 'closed';
    resume(): Promise<void>;
    suspend(): Promise<void>;
    createGain(): GainNodeLike;
    createDynamicsCompressor(): DynamicsCompressorNodeLike;
    createBufferSource(): AudioBufferSourceNodeLike;
    createPanner?(): PannerNodeLike;
    createBiquadFilter?(): BiquadFilterNodeLike;
    createConvolver?(): ConvolverNodeLike;
    decodeAudioData?(data: ArrayBuffer): Promise<AudioBufferLike>;
}
export type AudioContextFactory = () => AudioContextLike;
export interface AudioGraph {
    context: AudioContextLike;
    master: GainNodeLike;
    compressor: DynamicsCompressorNodeLike;
    filter?: BiquadFilterNodeLike;
    reverb?: ReverbNode;
}
export interface ReverbNode {
    convolver: ConvolverNodeLike;
    input: GainNodeLike;
    output: GainNodeLike;
}
export declare class AudioContextController {
    private readonly factory;
    private context?;
    constructor(factory: AudioContextFactory);
    getContext(): AudioContextLike;
    resume(): Promise<void>;
    getState(): AudioContextLike['state'];
}
export declare function createAudioGraph(controller: AudioContextController): AudioGraph;
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