What does Western music sound like to non-western ears?

In another thread about using heavy metal as an “interrogation aid” with Iraqi prisoners, somebody mentioned that certain music would have a magnified impact on somebody who isn’t familiar with western music.

That got me thinking about things like Chinese opera, which, when first I heard, I was surprised to learn was music. Not to be disparaging to any culture’s art forms, but from my limited perspective, I didn’t think of this as music.

So… how does, for example, Mozart sound to somebody whose musical tradition is completely different?