Great topic!

I think music is language. Also, sounds/notes have been linked with levitation and opening interdimensional doorways, amongst other things. Music is magical.

The best I can do is share my extracurricular experiences thus far with music and spirit. Here are some examples from my journal:

20 Mar 07
Last night I had dreams or experiences that were almost impossible to put into words, but very profound. I was immersed in a very fundamental reality as if flowing along with giant moray eels... there was some form of music inherent to and running through this reality.

18 June 07
Some beings I had been speaking with during sleep needed me conscious, which is why I found myself awake. They had spoken in my mind while I was unconscious. Their voices were accompanied by music that reminded me of a TV game show theme in its enthusiasm and grandness (trumpets!), yet it was a little more choppy and nothing I can remember ever specifically hearing before. (Actually I think their voices were music, I was just able to understand the equivalency in word).

09 July 07
I woke at intervals in the night bringing with me conscious statements of important facts. The last one I remembered this morning and prompted me to wake and try to record whatever else I could remember was, “A [form of] lap guitar is played by all cultures”. And I knew this related in some way to music as a basic level of communication.

Not to mention that I receive countless hints, synchronicities and messages by noting the tune or lyrics running through my mind at any given time.

Another interesting thing to explore is kymotropes by MythMathFilms. Kymotropes are animated oscillographs set to music of similar sine waves. It speaks to the soul. I am fortunate to have the DVD which prompted this dream:

05 Nov 06
I dreamed that I received a book (looking much like the Kymotrope DVD cover) that was about how to talk to God. It was labeled “stereograms” and showed pictures of kymotropes.