Well I played Felix Baby Lullaby's too in Utero, but it was my smeaky DP that left the bigger impression. When I was asleep at night he'd stick the earpiece of his discman in my belly button filled with music like Rob Zombie and Ramstein and guess what Felix likes????
DP actually sings him the words to the songs and it stops him crying instantly..not my choice(I was totally unaware actually!) but I think it shows that the music doesn't have to be traditionally soothing to be effective!