Open source
Some of our apps include open-source libraries. Each app lists them, with their licences, under About → Acknowledgements. Where a licence asks us to offer the library’s source code, it’s here.
Audio Converter
Audio Converter uses LAME and libsoxr under the GNU Lesser General Public License. They ship as separate, unmodified dynamic libraries inside the app (libmp3lame.dylib and libsoxr.dylib in Audio Converter.app/Contents/Frameworks), built from the upstream release tarballs. You may replace either library with your own build, for example a modified version or a newer compatible release, and Audio Converter will use it. The app’s Acknowledgements (THIRD_PARTY_NOTICES.txt) explain how. Their exact source for each version of Audio Converter is below.
The source files appear here with the app’s first release.