He has taught at the University of North Texas College of Music since 1992, where he is currently Distinguished Teaching Professor and Chair of Composition Studies.
[4] He has collaborated with the International Contemporary Ensemble,[5] Pittsburgh New Music Ensemble, Locrian Chamber Players, Voices of Change, Orchestra 2001,[6] and numerous solo artists including vocalist Joan La Barbara, flutist Helen Bledsoe, cellist Madeleine Shapiro, and glass harmonica player Thomas Bloch.
Klein's creative output comprises solo, chamber, and large ensemble works, including instrumental, vocal, electroacoustic, and intermedia compositions.
[8] Klein frequently incorporates theatrical elements in his work, either as an extra-musical feature or as an organic extension of the musical narrative.
[10] In particular, Canetti's writings Earwitness (Der Ohrenzeuge, 1974) and Crowds and Power (Masse und Macht, 1960) have inspired over twenty solo instrumental and open-form chamber works composed since 1997.