San Francisco-based multimedia artist, composer, and improviser Jon Leidecker makes music under the pseudonym Wobbly. He is an active member of both the seminal experimental group Negativland, and with the Thurston Moore Ensemble. Over the course of a varied musical practice that began in the mid-1980s, Wobbly has collaborated with artists including Matmos, Dieter Moebius (Cluster), Tania Chen, Fred Frith, Tim Story, David Toop, Zeena Parkins, and People Like Us. Leidecker has released recordings on labels like Illegal Art, Important Records, Hausu Mountain, Bureau B, and Tigerbeat6. After contributing extensively to Negativland’s live-mix radio program Over The Edge, spearheaded by the late Don Joyce and broadcast from Berkeley’s KPFA FM, Leidecker inherited the program in 2015.