On the basis of his large collection of historical scores and recordings he has contributed to musicological projects researching classical guitar music.
He learned the guitar from age 11 and studied at the Musikhochschule Köln (Aachen campus) with Tadashi Sasaki (1988–93) and operatic singing with Margarethe van den Eynden and Klaus Jürgen Küper.
He has performed as soloist, chamber musician and with orchestra throughout Europe, Israel, USA, Canada, and Mexico, and adjudicated at international guitar competitions.
With almost 8,000 items, he owns one of the largest private collections of recorded classical guitar music in the world and is consulted regularly by various international archives and institutions.
He has contributed, with Jörg Jewanski, to numerous biographies of guitarists in the German encyclopedia Die Musik in Geschichte und Gegenwart (MGG) (Kassel: Bärenreiter, 1996–2008).