Playing Music for Baby

I read that the baby’s hearing is fully developed now so it’s the ideal time to read to your belly and play music.  I played some Death Cab for Cutie and Coldplay on my iPhone for the baby because I thought it would be mellow and it started moving around like crazy.  It looked like a beating drum on my belly and actually started to hurt after a while so I had to turn the music off.  I can’t really tell if the baby liked the music or really didn’t like it.  I guess next time I should try lullabies instead or something more soothing.  Maybe the soother sound machines I got for the baby, like the sleep sheep or sea dreams soother.  I’ve also been reading books to my belly but haven’t noticed any reaction or movement to my voice.  It’s interesting that there was so much reaction to the music though.