The issue is whether or not one person's transcendent experience listening to music can be compared to another's, particularly if the genres of music are very different. A. C. Douglas, one of my "Regular Reads", maintains that the transcendent experience offered by "high culture" is much superior to that offered by pop culture.
To really answer the question you have to both get inside other people's consciousness and make value judgments about their experiences.
Another thing that comes to mind when talking about a U2 performance versus that of a symphony orchestra is that part of what Bono is up to is a kind of modern shamanism. Which leads to the question of whether someone like Leonard Bernstein was just another kind of shaman. It's easy to make the case that a kind of ritual is involved in both rock and symphonic performances.
And then there's what Stanislav Grof found in his research into psychedelics and transcendent experiences back when that was legal, that the mindset of someone approaching the experience combined with the setting in which it occurs has a lot to do with the outcome.
Back in the 70's when I was getting getting my Registered Music Therapist credential, music therapy was called an "adjunctive therapy". As far as transcendent experiences go, my feeling is that music can be involved in them, but is probably not the single cause when they occur when listening to or making music.
