The recording industry is seeing consistent losses, each 6-months. Why? Well, there are lots of reasons but simply stated, people are buying less CD’s and although downloads are strong they are not making up for the losses in lost CD sales.
One other reason music sales are down is because all the good notes are being used up. We have hit the mathematical limits unfortunately.
Why stop at selling songs, though? Why not sell parts of songs? Break them up into verse\chorus\guitar solo etc. 25 cents per chorus! You could buy DSOTM minus "The Great Gig In The Sky" if you wanted, or just buy the heartbeat section if you're so inclined (you know, for subwoofer stunt music). Then you could create playlists of just your favorite song fragments. Why pay for the annoying verses of "Achy Breaky Heart" when what you really want is the refrain?
Additionally, they could sell individual instrument tracks from songs so you could for instance, replace the wailing woman vocal with a different singer or the sound of goose getting it's neck stepped on. Get a Pantera CD without the drums. Buy only one chorus of "Midnight Cruiser" and leave the rest on the cutting room floor. There are many possibilities.
One day it could even be taken so far as to sell musical instruments so listeners would be able to generate their own songs and record them on their iPods. This technology however, is purely theoretical and decades away from becoming viable.