export declare class WebAudioFontChannel {
    audioContext: AudioContext;
    input: GainNode;
    band32: BiquadFilterNode;
    band64: BiquadFilterNode;
    band128: BiquadFilterNode;
    band256: BiquadFilterNode;
    band512: BiquadFilterNode;
    band1k: BiquadFilterNode;
    band2k: BiquadFilterNode;
    band4k: BiquadFilterNode;
    band8k: BiquadFilterNode;
    band16k: BiquadFilterNode;
    output: GainNode;
    constructor(audioContext: AudioContext);
    bandEqualizer(from: AudioNode, frequency: number): BiquadFilterNode;
}
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