DoremiSoft FLV to MP3 Converter is specially designed for MP3 fans to convert their favourite FLV files to MP3 format. The clear-cut and bright graphic user interface makes you feel comfortable. Most importantly, it is a professional FLV to MP3 Converter, which enables you set channels, sample rate, bit rate and volume as you like.
Furthmore, it features batch FLV files conversion at the same time. In addition, you can add artist and title tags to MP3 files according to your need. Complete free software, download and try now!
MUHHHAHAHAHAHAHAHAHA now i can steal music off youtube MUHHHHHAHAHAHAHAHAHAHAHAHAHAHAHA:D
^Yeah, that is obviously the only intended use for this program. It is much easier than my usual method, though, which involves converting the .flv to .wav with the Bink Converter and converting the .wav to .mp3 with Audacity.
with AoA audio extractor you can convert to wav or mp3 
Try this converter!
FLV Video Converter is the best converter that can perfectly finish your task. Using FLV Video Converter allows you to convert flv files to all kinds of video and audio formats like avi, wmv, mpeg, mov, mp4, 3gp, xvid, divx, aac, ogg, wav, mp3, etc.
You can go to www.convertflv.biz to download it.