declare class Chromagram {
    private window;
    private buffer;
    private magnitudeSpectrum;
    private downsampledInputAudioFrame;
    private chromagram;
    private pitches;
    private referenceFrequency;
    private noteFrequencies;
    private bufferSize;
    private samplingFrequency;
    private inputAudioFrameSize;
    private downSampledAudioFrameSize;
    private numHarmonics;
    private numOctaves;
    private numBinsToSearch;
    private numSamplesSinceLastCalculation;
    private chromaCalculationInterval;
    private chromaReady;
    private kiss_ready;
    private fft;
    private realInput;
    private complexOutput;
    constructor(frameSize: number, fs: number);
    setParameters(_referenceFrequency: number, _numHarmonics: number, _numOctaves: number, _numBinsToSearch: number): void;
    processAudioFrame(inputAudioFrame: Array<number>): void;
    setInputAudioFrameSize(frameSize: number): void;
    setReferenceFrequency(freq: number): void;
    getReferenceFrequency(): number;
    setNumHarmonics(n: number): void;
    setNumOctaves(n: number): void;
    getNumOctaves(): number;
    setNumBinsToSearch(n: number): void;
    setSamplingFrequency(fs: number): void;
    setChromaCalculationInterval(numSamples: number): void;
    getChromagram(): number[];
    getPitches(): number[];
    isReady(): boolean;
    setupFFT(): void;
    calculateChromagram(): void;
    calculateMagnitudeSpectrum(): void;
    downSampleFrame(inputAudioFrame: Array<number>): void;
    makeHammingWindow(): void;
    round(val: number): number;
}
export { Chromagram };