@audio/encode-wav

Encode PCM audio samples to WAV format.
Pure JS — no WASM, no native bindings, works in both node and browser.

import wav from '@audio/encode-wav';

const encoder = await wav({ sampleRate: 44100 });
encoder.encode(channelData);    // buffer PCM
const buffer = encoder.flush(); // → complete WAV file as Uint8Array

Options

Streaming

const encoder = await wav({ sampleRate: 44100, bitDepth: 16 });
encoder.encode(chunk1); // buffer chunk
encoder.encode(chunk2); // buffer chunk
const file = encoder.flush(); // → Uint8Array (complete WAV)
encoder.free();

Input is Float32Array[] — one array per channel. Channels are interleaved automatically.

Streaming output

stream: true: the header goes out with the first samples, sizes 0xFFFFFFFF (read to the end) and a JUNK chunk reserved for ds64, metadata chunks (meta, markers, regions) inside it. After flush(), head() returns the exact header, RF64 past 4 GB (EBU Tech 3306), to write over the start of a file. With frames (the exact length, known upfront) the header goes out exact and head() has nothing to add.

License

MIT

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