lame-wasm

LAME compiled into freestanding WASM with a TypeScript/JavaScript bridge API.

Installation and Example Usage

npm install @closeio/lame-wasm

import { init } from "@closeio/lame-wasm";

async function record() {
  // Mono 48kbps PCM input, 128kbps output
  const lame = await init({
    channels: 1,
    sampleRate: 48_000, // Perhaps from a `new AudioContext().sampleRate`...
    kilobitRate: 128,
  });

  const chunks = [];
  chunks.push(lame.encodeFloat(pcmData));
  chunks.push(lame.flush()); // finish with a flush

  const mp3 = new Blob(chunks, { type: "audio/mp3" });
}

License

lame-wasm itself is licensed under the MIT license, while the LAME library is licensed under the Library General Public License V2. lame-wasm contains no source code nor modifications of LAME, but its compiled, distributed form in the NPM registry is comprised of portions of LAME object code.

Development

With the default Nix shell:

nix develop --no-pure-eval '#.'

# Formatting
nix fmt .
oxfmt .

# Linting/typecheck
oxlint
tsc

# Demo development
vite

# Publishing (command order matters)
# Don't forget to update the CHANGELOG, package.json version, and add a git tag
vite build
tsc -p tsconfig.publish.json

pnpm login
pnpm publish --access public