Music

If anything can be music, what type of
music is worth making? What makes a combination of sound worth
listening to?

I think the music that John Cage was making, and his ideas behind it are the worth while type. He was challenging people's perception of what music is. He was considering where the combination of sound, silence, and composition creates music, and where those rules can be broken and still create music. I also think that "noise combinations" that may not sound appealing, but have interesting theories behind them are worth considering. (For example the weird scores created by Cage).

I think one thing that makes a combination of sound worth listening to is (like I said above) the theory behind it. In both music an art one of the most important things is to create rules and systematically break them. Sometimes the results are not "pleasant", but they are certainly interesting.