Is it possible to convert a 30 second clip of an .mp3 to .wav in Ubuntu terminal? For example if I had an .mp3 that was 3:00 minutes long, would I be able to create a 30 second clip from 0:45-1:15?

I'm able to convert the entire song using mplayer in Ubuntu.

mplayer 

  -quiet 

  -vo null 

  -vc dummy 

  -ao pcm:waveheader:file="output.wav" "input.mp3"

http://en.linuxreviews.org/HOWTO_Convert_audio_files

I'm open to suggestions using mplayer, LAME, mpg123, mpg321 or other encoders!