If I remember correctly, mp3splt is command line only and pretty cumbersome to use; install mp3splt-gtk to have the GUI. Oddly, I see[1] that it's in oldstable and Sid, but not in stable. [1]: https://packages.debian.org/search?keywords=mp3splt&searchon=names&suite=all§ion=all -- Emanuele Rusconi