Henri Bok is noted for his new sound combinations leading to unusual instrumental groups: Duo Contemporain (with marimba/vibraphone), Duo Novair (with accordion), Bass Instincts (with bass oboe), Duo Clarones (bass clarinet duo with Luis Afonso 'Montanha'), Duo HeRo (with jazz pianist Rob van Bavel) and Duo Hevans (with Eleri Ann Evans, saxophones).
Collaboration with fellow musicians Gustavo Beytelmann, José Luis Estellés, Mike Garson, Josef Horák, Bennie Maupin, Justo Sanz, Louis Sclavis, Willem Tanke, Henri Tournier, Dawn Upshaw, Eric Vloeimans, and many others of all styles and genres hav resulted in many new pieces dedicated to him.
Henri has been professor of bass clarinet at Codarts/Rotterdam Superior Conservatoire (The Netherlands) and at Musikene (San Sebastian, Spain), as well as a guest professor at the Robert Schumann Hochschule für Musik (Düsseldorf, Germany). Since 2000, he has also taught the bass clarinet class during the annual Julian Menéndez clarinet summer course in Ávila (Spain). Bok is also professor of free improvisation at Codarts and has performed at several improvisation festivals (amongst others in Tallinn, Estonia).
New Techniques for the Bass Clarinet, written in 1989 (revised in 2011), is considered to be the standard work for instrumentalists and composers interested in extended techniques.
In 2005 Henri Bok was the initiator and artistic director of the first World Bass Clarinet Convention. This took place in Rotterdam and was attended by more than five hundred bass clarinetists from all over the world.
Following his first piece Vinho do Porto Brasileiro (1997), Bok has written a large number of solo works and chamber music. His compositions are published by Shoepair Music.
Henri Bok is an endorser for Henri Selmer Paris, RICO, Pomarico, and Wiseman cases.
"Duo Contemporain", with Miquel Bernat. Globe, 1994
"Duo Novair", with Miny Dekkers. Globe, 1995
"Tube Makers", with Miquel Bernat. Globe, 1998
Music for Bass Clarinet and Piano, with Rainer Klaas. Clarinet Classics, 1999.
Worlds of Bass Clarinet. Globe, 1999.
"Duo Clarones", with Luis Afonso Montanha. YBMusic, 2001
Wicked!. Artistic License, 2003
BASSics, with Rob Broek. Clarinet Classics, 2003.
HeRo, with Rob van Bavel. Bloomline, 2005.
Henri Bok plays David Loeb. Vienna Modern Masters, 2005.
"In a Nutshell". DVD Shoepair Music Prod., 2006
"HeRo's Own", with Rob van Bavel. Shoepair Music Prod., 2008
"HeRo's Heroes", with Rob van Bavel. Shoepair Music Prod., 2008
"HeRo's Classics", with Rob van Bavel. Shoepair Music Prod., 2008
"Windsongs", with Joaquin Meijide. Vienna Modern Masters, 2009