Sonic Youth has scoured its archives for a host of previously unreleased material to augment the forthcoming reissue of its 1992 DGC album "Dirty." The new edition, due March 4, sports 20 additional tracks, including B-sides and 11 unissued rehearsal recordings. It will also include a 28-page booklet, with essays from group members Thurston Moore and Lee Ranaldo as well as journalist Byron Coley.