The music industry went through many changes in the mid to late 90s and has yet to come to terms with them. First was the end of the rock era. This was a huge blow that most people still refuse to accept though popular music has been replaced with R&B and Rap and rock music is in the back seat now, much as the change over TO Rock in 1955.
This meant a lot of mainstream people were put off and stop buying.
Second was the end of cassette tapes and the change over to CDs. People were busy replacing tapes and vinyl with CDs and this inflated sales. When people replaced their CDs they stopped. The mp3s came out and people fearing another change over of formats, stopped buying again.
When the sales dropped the music industry blamed piracy instead of recognizing a shift out of Rock Music and the fact that now that CDs could be ripped, music was competing with itself. There simply is no need to come up with new groups because people can go buy the Beatles and get the original. Groups like the Eagles and Fleetwood Mac are still touring and selling their old stuff.
Hence the market for new stuff is limited, simply because there is so much of the old stuff to buy.
MySpace has over one million profiles for bands and solo artists alone. That is one MILLION people pretty much giving away their stuff for free.
The market is oversaturated. Singers like actors and writers have outpriced themselves and are being replaced by ametuers.
The final fact is that most peope will download music they’d never buy. The music industry sees each download as a missed sale. But if it wasn’t free it wouldn’t be downloaded.
Also the Internet has allowed people to basically choose their own music and in a sense be their own radio station. This means acts that got by, though riding on other acts via the radio, the “one good song, three bad songs, one good song” bridge used by radio, provided royalties, however minimal to marginal artists.
This is fading quickly.
So easily the music industry still hasn’t learned to cope with the Internet, 'cause they are ignoring everything about it. You can’t force a business model on people, yet this is what they are trying to do.
But they’ll learn. Movies killed Vaudeville, TV killed Movies, TV killed Radio, FM killed AM etc etc. But none of them died they all came back in different forms with different business models. Vaudeville is back via reality TV and YouTube.