ruby-mp3info read low-level informations and manipulate tags on mp3 files. * Written in pure ruby * Read low-level informations like bitrate, length, samplerate, etc... * Read, write, remove id3v1 and id3v2 tags * Correctly read VBR files (with or without Xing header) * Only 2.3 version is supported for writings id3v2 tags * id3v2 tags are always written in UTF-16 encoding