what is the difference between good and bad music


my friend says rap is bad music. another friend says mahler is a terrible composer.

is it all subjective, i.e., a matter of opinion ? or are there standards which can distinguish good from bad music, however one defines these terms ?

if there are standards, can one specify them or refer me to a source ?
mrtennis
Good music sounds good, bad music sounds bad.

I hope that clears things up.:-)
You mean bad as in whack, or bad as in phat. 'Cause bad rap music could be phat, or it could be whack.

Feel me?
"Wine, women and song" is an expression that goes well together and, to me, beauty is in the senses of the beholder. Can you really set rules for greatness in any of these categories which are not, in the end, subjective? After all, each is entirely too complex to be absolutely defined or measured.