MP3 encoding uses LAME, a project by the LAME developers, through the
unmodified @breezystack/lamejs 1.2.7 JavaScript port by Alex Zhukov and contributors.

LAME project: https://lame.sourceforge.io/
Port: https://github.com/gideonstele/lamejs
Published package: https://www.npmjs.com/package/@breezystack/lamejs/v/1.2.7
Matching source revision: 1fb0ef5fa177413107e2e107d054a9b994e3f79c

The encoder is distributed under LGPL-3.0. Its original published bytes are
served separately at /audio-encoder/lamejs.js, outside AcadCrate's bundles.
No modifications have been made to the encoder.

Alongside this file:
  lamejs-source.zip - matching source code, including build configuration
  LAME-NOTICE.txt - original package notice
  LGPL-3.0.txt and GPL-3.0.txt - license texts
  UPSTREAM-README.md - original readme

The audio worker imports the encoder only for MP3 exports. To use a modified
compatible encoder, replace /audio-encoder/lamejs.js with an ES module exporting
Mp3Encoder(channels, sampleRate, kbps), encodeBuffer(Int16Array, optional right),
and flush(), returning MP3 byte arrays. No AcadCrate bundle rebuild is required.
Reverse engineering to debug modifications of the LGPL library is permitted.
The encoder is provided without warranty. See the license texts for details.