is there any simple and lightweight linux SW for cropping, trimming mp3 and other audio files?

example i need to quickly trim mp3 file some time on the beginning some time at the end.

Have Debian and Gnome

so far i found these commands:

sudo aptitude install mpgtx
mptsplit input.mp3 [00:00:20-00:00:58] -o output.mp3
sudo aptitude install poc-streamer
mp3cut -o output.mp3 -t 00:00:20+000-00:00:58+000 input.mp3
sudo aptitude install ffmpeg lame
ffmpeg -ss 30 -acodec copy -i inputfile.mp3 outputfile.mp3
sudo aptitude install cutmp3
cutmp3 -i foo.mp3 -O 30s.mp3 -a 0:00.0 -b 0:30.0