Various little python tools I've created and used to manage audio files. Most of them use the python library mutagen, and so are licensed under GPL 2.
Usage instructions and descriptions of the tools are described some in the header comment of the tools themselves.
The tool to "fix" filenames is not purely relevant to audio applications, that's just the reason that I created it.
The tool to fix m3u playlsits has only been tested on music playlists exported from a music app on my phone with an identical directory structure on a computer. Beware of dragons if your usage does not match this.