Born and raised in Sioux Falls, South Dakota, Arnold took accordion lessons and discovered guitar when he saw the Beatles perform on The Ed Sullivan Show. He attended the University of South Dakota but switched to the Berklee College of Music in 1976. He took private lessons from Jerry Bergonzi and Charlie Banacos. Arnold moved to New York City in 1988 where he became an active member of the jazz community, producing many recordings as a sideman and leader. He is one of the few electric guitarists in the world to use the computer program SuperCollider in both his compositions and improvisations. Arnold is a founding member of Spooky Actions, a jazz group which explores improvisation using classical music repertoire. He has played with Stuart Hamm, Peter Erskine, Joe Pass, Joe Lovano, Lenny Pickett, Randy Brecker, Stanley Clarke, the Boston Symphony Orchestra, and the Absolute Ensemble under the baton of Kristjan Järvi. Arnold's recording credits include over twenty albums and DVDs (on Muse-eek Records, Mel Bay Recordings, Truefire and other labels), ranging from standard jazz repertoire to free improvisation to reinterpretations of classical music. Teaching and writing He is the director of Guitar Studies at New York University and Princeton University as well as the creator of the New York University Summer Guitar Intensive. He has taught at the New England Conservatory, Dartmouth College, Berklee,[1] New School University, and City College of New York. Arnold's theoretical works have explored the use of pitch class set theory within an improvisational setting. He has also written more than 300 music instruction books covering guitar pedagogy, ear training, and time studies.