Sanfrancisco Sightseeing Shuttle Tours

SAN FRANCISCO - "No depression" has been used to explain a filament of alternative American roots music since the early '90s, but for Jeff Tweedy, whose song helped motivate the phrase, the two words now have a more immediate and literal importance.

Two years after going through rehab for nervousness disorders and addiction to painkillers, the singer and songwriter says he feels like a new person. And Tweedy, 38, figures that the change is bound to come through in new music he's started recording with his band Wilco, one of the most highly praised groups in American rock.