This might help. I haven’t used it but lifehacker is usually is pretty good about suggesting software. Keep in mind this just records the audio played on your computer. So you actually have to listen to what you record when you record it.
To rip audio from YouTube video clip is quite easy and quick by the use of a program called streaming audio capture. You only need to play YouTube clip on your computer and then this program can catch and save it into WAV.WMV, etc automatically. I like using this program to rip audio from youtube videos.