Let's see... shall I weigh in on this as well?
OK - although the topic is "Music theory" it seems that this is more of a philo debate than anything else...
Let's see then, here's my definition of "what is music"
The audial representation of an idea or expression conveyed to others in a repeatable format that is subjectively judged by the listener to have a pleasing quality.
If it doesn't meet those req's then I suppose it's noise - to that particular listener.
There are two key words in that definition:
Audial and Subjective
Problem seems to be that although you can define "music" you cannot quantify "good music". No matter the style some will love it and others will act like your running your nails down a chalkboard.
case in point: speedcore**
Now, I believe that Triskele mentioned that he could actually help discuss theory - any others? Instead of debating our personal preferences, maybe it would be a much better idea for someone to actually post a few bits of actual theory - almost like an online class ... sort of ... we might actually learn something from each other.
Naaaahh... forget that - it's much more fun to sling bullshit at each other. :D
** is anything playing at somewhere between 500 and 1000 bmp really music to anything other than a hummingbird?