This is not about downloading Youtube videos.

I used to record youtube videos as wav while it was playing in my browser and then convert to MP3 on my laptop with jetAudio, but now I have an old PC which doesn't let me do that. I tried jetAudio but no luck, I guess it's because of built in soundcard.

Any other programs you know that may let you do that? And doing so I think it's legal since I'm not downloading them.