Mutagen is a Python module to handle audio metadata. It supports FLAC,
M4A, MP3, Ogg FLAC, Ogg Speex, Ogg Theora, Ogg Vorbis, True Audio, and
WavPack audio files. All versions of ID3v2 are supported, and all
standard ID3v2.4 frames are parsed. It can read Xing headers to
accurately calculate the bitrate and length of MP3s. ID3 and APEv2 tags
can be edited regardless of their audio format. It can also manipulate
Ogg streams on an individual packet/page level.