I've only used Ardour, but I've seen Qtractor mentioned quite a bit here. I had never really paid attention to it, thinking that it was some kind of quirky software for electronic music composers. But today I was curious and I browsed its web page. It seems to be a simpler version of Ardour, to my ver unexperienced and unknowledgeable eyes. Is it so? Is there some comparison between them that I can check to know more?