If you are referring to mainstream or chart music then it is equivalent to processed foods, it is mass marketed, is of low quality and the best thing about it will usually be the packaging.
I don't mean to sound harsh but I work as a session drummer, I hear the same old rubbish day in and day out, I also happen to produce music and know that most of the stuff out there only sounds the way it does as labels tend to use the same producers time and time again, they are the actual talent behind most modern acts.
e.g do you think cheryl cole sits down and writes and produces her own albums, all those late nights gettin the sound she wants, lol no
What I found disgusting was that people actually voted britney spears as a better singer that Aretha Franklin, what is up with that ? the music industry is ruined with the likes of x factor types and record companies that simply do not take risks anymore, but the record companies are not only to blame, people are lazy too, they don't want to look for anything, they want instant buzz also so they are not prepared to develop their musical range again like the fast food thing, quick hit, no quality or substance.
However there are many many good bands , producers, artists out there too it is just far harder for them to get signed or a break in the industry as they cannot be marketed the way record companies want or out of their own personal choice.