According to the interview with Dan in NOW this week, he's just a really quiet singer..so it's possible we just couldn't hear him... http://www.nowtoronto.com/issues/2006-09-14/music_feature.php "It's hard for me to find people to sing with, especially in Germany, because it's not a traditional thing that they do. They don't just freely harmonize with each other. The other thing is, I've got a very quiet voice, so if I sing with people with normal voices you can't hear me at all. I just recorded absolutely for the fun of it."