I get triggered by music a LOT. Certain music triggers me to dissociate and have other alters take over. I am very controlling over the music I listen to for this reason. I never listen to the radio because they play all sorts of music and I often don't even know what music is going to trigger me until its too late.
Music can be a trigger like everything else. Music is often emotive so can form strong associations with certain events, traumas, feelings etc and these can get triggered up really easily.
When I was a child my family had the radio playing all the time. They listened to music and to talk back shows. I can't tolerate any form of talkback radio now - it triggers me to switch because it has such strong negative associations with all the traumas of my childhood. If talkback radio comes on anywhere I really can't handle it. Any popular music from those decades of childhood trigger me in just the same way.
I really don't listen to music much even now. I have some favorite songs that I play somtimes.