T.I., who is under house arrest in Atlanta while awaiting trial on federal weapons charges, has begun writing material for his next album. The news, first reported by Entertainment Weekly, was confirmed by a T.I. spokesperson.

Six songs are in the mix for "Paper Trail," due in September 2008 via Grand Hustle/Atlantic. T.I. is writing his lyrics down on paper, which he hasn't done since his debut album, "I'm Serious," in 2001.

"Usually when he records an album he does 100 songs and chooses from that -- it's just that now he's officially starting to record," a spokesperson tells Billboard.com. "There are no song titles yet because who's to say if these songs are even going to make the record."