Claudia Engelhart (Sound Engineer) has been a professional live-sound engineer for the past 25 years. Born in 1963 and raised in Berkeley, California, Claudia grew up among a family of musicians and artists, and was exposed to diverse music from around the world. She studied cello for 10 years. In 1982, while attending The College For Recording Arts in San Francisco, she began her career working live sound in the historic San Francisco jazz club Keystone Korner. In 1983 she moved to New York City and continued working in clubs such as CBGB's, The Bitter End, and S.O.B.'s. In 1985 she began touring full-time, internationally, as a front of house engineer. Since 1989 Claudia has been touring with Bill Frisell. She has recorded two live albums for Frisell, 'East/West' released in 2005 on Nonesuch Records, and & 'Bill Frisell Live'; recorded in 1993 on Gramavision Records. Claudia has also worked and toured extensively with other renowned artists such as Ryuichi Sakamoto, Wayne Shorter, Herbie Hancock, Michael Brecker, David Byrne, Laurie Anderson, David Sylvian, John Patitucci, Dave Holland, Grover Washington Jr., John Scofield, Medeski Martin & Wood, John Zorn, The Kronos Quartet, Don Cherry, Cecil Taylor, Fred Frith, Eddie Palmieri, Willie Colon, Airto Moreira and Flora Purim, among others.

In the last few years, Martin's career has involved working with fundraising databases of non-profit organizations, something that he still does. He is also a guitarist and composer, and performs occasionally. In 1998, he earned a Master of Music degree from DePaul University in Chicago.

He lives in Grand Rapids, Michigan, with his wife and son.