Provides functions for reading and writing metadata for a variety of common audio formats. Currently supports both ID3v1 and ID3v2 for MP3 files, Ogg Vorbis comments and ID3 tags and Vorbis comments in FLAC, MPC, Speex, WavPack TrueAudio, WAV, AIFF, MP4 and ASF files. It also handles management of taglib files and strings, automatically freeing allocations when computation is finished.