/**
 * Given arrays of raw pcm audio, downsamples the audio to desired sample rate and encodes it to a wav audio file.
 *
 * @param recBuffer {Float32Array[]} - 2d float array containing the recorded raw audio
 * @param recLength {number} - total length of recorded audio
 * @param recordSampleRate {number} - sample rate of the recorded audio
 * @param exportSampleRate {number} - desired sample rate of the exported file
 */
export declare const exportBuffer: (recBuffer: Float32Array[], recLength: number, recordSampleRate: number, exportSampleRate: number) => Blob;