change bitrate of mp3 files in one click at high speed and quality! one of the featuers of 4musics mp3 bitrate changer is that it works from right click menu on a file. simply right click on mp3, select "convert to mp3"!  as easy as 1, 2, 3! what is a mp3? mp3 stands for mpeg 1 (motion picture experts group) layer 3. the power of mp3 files lies in their ability to store music and audio using substantially less memory than other formats. smaller file sizes translate to faster downloads and less expensive storage requirements, making it possible to store and play mp3s with reasonable priced hardware. all of this amounts to a more flexible and affordable way of distributing, managing and listening to music. main features: - converting in one click! - high speed; - setting resulting format options; - automatic source deleting; - drag and drop support; - skin support; - playlists support; - editor of tags.