Seigfried is a critically-acclaimed bassist and guitarist deeply involved in the Chicago music scene. He has performed and recorded in virtually all musical styles — jazz and classical, country and rock, traditional and avant-garde. He has received rave international reviews for his performances and compositions documented on twenty-two recordings. As a bandleader and composer, Karl has led groups
featuring Ernest Dawkins, Jimmy Ellis, Nicole Mitchell and Jeff Parker. His recordings as a leader feature the best of Chicago's Young Lions, including Frank Rosaly and Greg Ward. Karl has performed duets with Bobby McFerrin, Fred Hopkins, Peter Kowald and Nik Turner and played in ensembles fronted by Roscoe Mitchell, Fred Anderson, Henry Grimes, George Lewis and Bertram Turetzky. His recorded collaborations include work with members of Hawkwind, Gong, Jefferson Starship, Cartoon, Psychic TV and Lucky Leif & the Longships. Karl produced, co-wrote and played bass and guitar for "Of Alien Feelings," the new album by Calvin Weston, legendary drummer for Ornette Coleman, James "Blood" Ulmer, Derek Bailey, Marc Ribot, James Carter and many others. The album's lineup of players features a cross-section of virtuoso instrumentalists from modern jazz and progressive rock: Todd Rundgren (Utopia), John Medeski (Medeski Martin & Wood), Jack Walrath (Charles Mingus Quintet), John Helliwell (Supertramp), Jay Beckenstein (Spyro Gyra), Vernon Reid (Living Colour), Nik Turner (Hawkind) and Thijs van Leer (Focus). Karl has played bass in big bands for nearly twenty years, including with such diverse groups as the AACM Great Black Music Ensemble and the Glenn Miller Orchestra. He is a founding member of Saalik Ziyad's NSA Ensemble, an intergenerational and multicultural group that plays completely original music. He also performs regularly with Alan Gresik's Swing Shift Orchestra, the swinging big band that has been in residency at Chicago's historic Green Mill since the 1990s. Karl has performed as a soloist with both the Chicago Sinfonietta and the Rockford Symphony Orchestra. He has played Principal Bass behind soloists such as Emmanuel Ax, Joshua Bell, Evelyn Glennie, Hilary Hahn, Sharon Isbin, Yo-Yo Ma, Mark O'Connor and Itzhak Perlman. He is Principal Bassist of Chicago orchestras including the Chicago Modern Orchestra Project, Mantra Blue Free Orchestra and New Black Music Repertory Ensemble. He was Principal Bassist for the Peoria Symphony Orchestra for a decade and held the same position with the Chicago Sinfonietta Chamber Ensemble, City Symphony of Chicago and Heartland Festival Orchestra. He is currently a member Rockford Symphony Orchestra. Karl's doctoral dissertation — "At Once Old-Timey and Avant-Garde": The Innovation and Influence of Wilbur Ware — remains the only scholarly work on the great Chicago bassist. Karl is a Velvet Strings Bass Artist and plays the Garbo Set for both classical and jazz. He's also a Music Man Bass Artist and plays the Reflex Bass 5 electric bass.