What are the restrictions and limitations of downloading music from the Internet?

Answer:
There is some material that's free to download, usually for promotional purposes.
But most is copyrighted material that the artist really would have liked to be payed for, downloading that stuff w/o paying is illegal.
First answer by Dabac. Last edit by Dabac. Contributor trust: 486 [recommend contributor recommended]. Question popularity: 3 [recommend question].