import { NoiseChannel } from './channels/noise-channel';
import { QuadrangularChannel } from './channels/quadrangular-channel';
import { WaveChannel } from './channels/wave-channel';
export declare class Audio {
    readonly ch1: QuadrangularChannel;
    readonly ch2: QuadrangularChannel;
    readonly ch3: WaveChannel;
    readonly ch4: NoiseChannel;
    private _enabled;
    private _leftVolume;
    private _rightVolume;
    private vinLeftEnabled;
    private vinRightEnabled;
    private eventListener?;
    private ticksCounter;
    private sequencerCounter;
    private pendingEvents;
    constructor();
    reset(): void;
    tick(): void;
    setEventListener(eventListener: IAudioEventListener): void;
    notifyListener(source: EventSource, name: EventName): void;
    enabled: boolean;
    leftVolume: number;
    rightVolume: number;
    nr50: number;
    nr51: number;
    nr52: number;
}
export declare enum EventSource {
    GLOBAL = 0,
    CHANNEL1 = 1,
    CHANNEL2 = 2,
    CHANNEL3 = 3,
    CHANNEL4 = 4,
}
export declare enum EventName {
    RESET = 0,
    ON_OFF = 1,
    VOLUME_CHANGED = 2,
    FREQUENCY_CHANGED = 3,
    DUTY_CHANGED = 4,
    WAVEFORM_CHANGED = 5,
}
export interface IAudioEventListener {
    onAudioEvent: (source: EventSource, name: EventName) => any;
}
export declare const DEFAULT_WAVE_DATA_DMG: number[];
export declare const DEFAULT_WAVE_DATA_CGB: number[];