Where the music "goes":
Physically, music "goes" everywhere in the form of waves through space. The music stops "going" after it's hit enough objects with high enough coefficients to reduce the wave forms to unperceivable levels... even then the music is still "going"....
Metaphysically, music "goes" deep into the mind and soul. A fine web of artisans spin intricate weavings of soul connections that bind the spiritual world to this domain. Each thread is a song, a scientific idea, or a new piece of art! The "ah Hah!" moment is unique to the artisan, who's ideas come from a netherworld of possibilities. Even if each thread is not seen/heard/or even known about here in the physical domain, it still exists and adds to the group consciousness of the world. It is part of our natural programming, like eating, we must create and explore, it is part of the universe's eternal quest to become more than the sum of it's parts.
Professionally, music has become _just another market_. Like the food market or the sex trade. Markets change direction like the wind in the ocean. Fads come and go and occasionally some brilliant artists, busy spinning their webs, get swept into the grand boat called market awareness. With the 'good old boys' at the wheel, artisans can catapult themselves into a new level of "going" somewhere. Corporate shwag, custom designed music to please the consumers, and lots of full-color print jobs. Eventually your music is "going" everywhere but hopefully you remembered to bring your own personality along, have a good time and retain your eternal soul.

The world is sound.