Before he celebrates the release of his new CD, On My Way to Houston (Tompkins Square), at the Freight & Salvage Coffeehouse next Tuesday night (Aug. 4), Texas/Berkeley legend Powell St. John brings his band, the Aliens, into the KPFA studio for rousing electric and acoustic sets. Best known in Bay Area music history as a founding member of Mother Earth (with Tracy Nelson) and the composer of "Living With the Animals," "Marvel Group," "The Fly," and other psychedelic-tinged folk-R&B classics), St. John is powerful singer and harmonica player–and a 2005 inductee into the Texas Music Hall of Fame–whose career has crossed paths with Janis Joplin, Boz Scaggs, Roky Erickson, the 13th Floor Elevators, and Doug Sahm.