If you need to convert your audio files, Mp3 Converter, as its name says, can be a good choice.
Mp3 Converter's interface is really intuitive and easy-to-use, you only have to chose the file you want to convert and then, the output format. The result files will be stored in the destiny folder in a matter of seconds (depending on the length of the file).
MP3 Converter can convert RM, RMVB, WMV, AVI, MPEG, MOV, QT to MP3, WAV, AVI, WMA, OGG.
It offers you a wide range of conversion as well as ID3 tag edition, what will make your music collection to be organized and occupying less space in your HD or portable multimedia device. By that way you'll be able to enjoy more music in the same space.