Hash FLV to MP3 Converter is a freeware utility designed to extract audio from FLV video and convert to MP3 audio format. The conversion rate of this application is high speed and the output MP3 file have as same as good quality with the source Flash file. With this application, you can convert all your YouTube Videos to MP3 format easily and quickly.
The interface of this utility is simple which makes the program very easy to use. To convert FLV files, select the add files tab using the interface. You can add multiple files for conversion. The MP3 file can be played in any of the MP3 Players available.
Although the conversion rate is good, there is no option to select the quality of conversions. Hash FLV to MP3 Converter is a handy utility for converting FLV to MP3.
Download Hash FLV to MP3 Converter
but I got this free flv converter, with which I can convert flv files to all kinds of video formats including AVI, wmv, mpeg, MP4, mp3, etc,
http://www.leawo.com/flv-converter/