import { MeydaAnalyzer } from "meyda/dist/esm/meyda-wa";
import type { Synth } from "./synth";
export declare class Audio {
    #private;
    synth: Synth;
    canvas: HTMLCanvasElement;
    rid: number;
    numSlots: number;
    vol: number;
    prevBins: number[];
    bins: number[];
    fft: number[];
    meyda: MeydaAnalyzer;
    settings: {
        cutoff: number;
        scale: number;
        smooth: number;
    }[];
    beat: {
        holdFrames: number;
        threshold: number;
        _cutoff: number;
        decay: number;
        _framesSinceBeat: number;
    };
    showCanvas: boolean;
    texture: WebGLTexture;
    prevSpectrum: Float32Array | null;
    constructor(synth: any, bins?: number);
    start(audioContext?: AudioContext, sourceNode?: AudioNode): Promise<void>;
    createTexture(): void;
    setBins(numBins: number): void;
    setCutoff(cutoff: number | number[]): void;
    setSmooth(smooth: number | number[]): void;
    setScale(scale: number | number[]): void;
    draw(): void;
    setBeat(options: {
        holdFrames?: number;
        threshold?: number;
        decay?: number;
    }): void;
    detectBeat(level: any): void;
    onBeat(): void;
    hide(): void;
    show(): void;
}