No, getting RockSmith on PC allows you to use unofficial DLC created by the public. 30,000 songs that RockSmith can't get licensing for, like The Beatles, Led Zep etc. I figure I have bought their albums, and CDs, AND remastered CDs many many times, so my conscience is clear on this.
Heck I still buy CDs, have never downloaded free music, so this is my only freebie.