/**
 * Convert PCM audio data to WAV format
 * @param pcmData - Raw PCM audio data as ArrayBuffer
 * @param sampleRate - Sample rate (default: 24000 Hz, common for TTS)
 * @param numChannels - Number of channels (default: 1 for mono)
 * @param bitsPerSample - Bits per sample (default: 16)
 * @returns WAV format audio as Blob
 */
export declare function pcmToWav(pcmData: ArrayBuffer, sampleRate?: number, numChannels?: number, bitsPerSample?: number): Blob;
