@audio/encode-aiff

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

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

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

Options

Streaming

const encoder = await aiff({ sampleRate: 48000, bitDepth: 24 });
encoder.encode(chunk1);
encoder.encode(chunk2);
const file = encoder.flush(); // → Uint8Array (complete AIFF)
encoder.free();

Input is Float32Array[] — one array per channel. Big-endian interleaving handled automatically.

Streaming output

stream: true: the header goes out with the first samples, sizes 0xFFFFFFFF (read to the end), meta as an ID3 chunk before SSND. After flush(), head() returns the exact header 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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