RMVB Video to MP3 audio, possible?

[kyo]

i have a mtv video file that i like very much, and i'd like to convert the audio part into mp3 so i can access it on my mp3 player or similar device
is this doable? the video is in rmvb
thanks

 

[potato28]

Transcode it to an .avi and run it through VirtualDub. I'm pretty sure theres a setting under audio, and a selection for the compression.