/// <reference types="node" />
import { FFT } from './transform-streams/FFT';
import { Readable } from 'stream';
import { EnvelopeType } from './global';
/** Shortcut function for setting up FFT/IFFT */
declare function quickFFT(stream: Readable | AudioBuffer, windowSize?: number, hopSize?: number, envelope?: EnvelopeType): FFT;
declare function quickIFFT(stream: any, windowSize?: number, hopSize?: number, envelope?: EnvelopeType): any;
export { quickFFT, quickIFFT };