If you want to download music from youtube, and you're running Linux, I highly suggest trying the 'youtube-dl' python script from Ricardo Garcia. There are quite a few flags supported for custom file conversions, including video conversion, but I'm mostly using this to download albums and songs.

Install

yum install youtube-dl

Usage

youtube-dl -x --audio-format=mp3 --verbose https://www.youtube.com/watch?v=hbtQX8ZDyN4

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