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
Ck out jaybo's comment on the thread "what to do with 1200 cds I do not need" made on 4-21. There Jaybo says, "what we collect defines who we are".
As I interpret Jaybo's nicely put comment, why keep music on our shelf that serves no purpose to our lives.
I'm getting just this point over at gramophone's forum, confronted with arguments from several members.
I mentioned that i have made a somewhat end to my search for new composer additions. I'm very happy with my 20 yr search for composers that reflect who I am.
Anything else will have to be heard at a concert, if ever.
The cds on our shelf reflect who we are.
I'm not saying that composers not rerepresented on my shelf is bad music, its just not important to me. Has no significance to my life.
The good/bad evaluation needs to be rephrased as to what is significant to us and what is superfluous.
What first began as an elimination of certain recordings I didn't need, many 2nd/3rd rate performances, the next step was to look for composers that could be eliminated.
There was not many to go, as i always had a good hunch as to what I liked and not.
If I were astral projecting would the "bad music" sound better? Oh ya, one more thing, why is blue nicer than green?
KidRock, now can anyone here say that is good music?
I mean really. Relects the times we live in.
Hello Redkiwi, Good to see you adding a thread or two. I thoroughly enjoyed your dissertation on component shelf experimentation several years back. It helped me out toward hearing “good music” from “bad music”. Happy Listening!