createWavHeader

Creates a standard 44-byte WAV (RIFF) header for raw PCM audio data.

function createWavHeader(
   dataLength, 
   sampleRate, 
   numChannels, 
   bitsPerSample): ArrayBuffer;

Defined in: src/utils/audio.ts:252

Creates a standard 44-byte WAV (RIFF) header for raw PCM audio data.

Parameters

Parameter	Type	Description
`dataLength`	`number`	The length of the raw PCM data in bytes (excluding header).
`sampleRate`	`number`	The audio sample rate in Hz (e.g., 16000, 44100).
`numChannels`	`number`	The number of audio channels (1 for mono, 2 for stereo).
`bitsPerSample`	`number`	The bit depth per sample (e.g., 16, 24).

Returns

ArrayBuffer

A 44-byte ArrayBuffer containing the WAV header.

Remarks

The header conforms to the WAV file format specification with:

RIFF chunk descriptor
fmt sub-chunk (PCM format, AudioFormat = 1)
data sub-chunk header

This header can be prepended to raw PCM data to create a valid WAV file.

Example

const pcmData = new Int16Array(16000); // 1 second of 16-bit mono at 16 kHz
const header = createWavHeader(pcmData.byteLength, 16000, 1, 16);
// Concatenate header + data for a valid WAV file

See

createAudioBlob for a convenience function that combines header and data.