Jan Jongepier (1941-2011) was an accomplished organist, organ consultant, and above all improviser, sadly now little known outside the Netherlands. He was one of the first Dutch organists to improvise in an historical idiom, and also was the teacher of the famous Sietze de Vries.
Recorded live in concert in 1992. Organ in Sint-Janskathedraal, 's-Hertogenbosch (den Bosch), the Netherlands.
Broadcasted by Radio Bloemendaal on Feb 07, 2021.

Sint-Janskathedraal s'-Hertogenbosch main organ. Case by Frans Simonsz.
Builders: Hocque Jr./Goltfuss (1622), van Hagerbeers (1634), Hoornbeeck (1718), Heyneman (1787), Vollebregt (1870), Flentrop (1984).

Hoofdwerk:
Praestant 16' - 1622 / 1984
Bourdon 16' - 1622 / 1634 / 1870
Praestant 8' - 1718 / 1787 / 1984
Holpyp 8'
Octaaf 4'
Tertiaan 3 1/5'
Quint 3' - 1718 / 1984
Super Octaaf 2' - 1622 / 1984
Mixtuur VII sterk - 1787 / 1984
Trompet 16' - 1787 / 1984
Trompet 8' - 1787 / 1984

Rugwerk:
Praestant 8'
Bourdon 8'
Quintadena 8'
Fluyttravers 8' (discant) - 1984
Octaaf 4'
Fluyt Dous 4'
Super Octaaf 2' - 1622 / 1984
Flageolet 1' - 1622 / 1984
Mixtuur V sterk - 1787 / 1984
Sexquialter II sterk
Trompet 8' - 1787 / 1984
Dulciaan 8' - 1787 / 1984

Bovenwerk:
Quintadena 16' - 1787 / 1984
Praestant 8' - 1622 / 1984
Roerfluyt 8'
Viola di Gamba 8'
Octaaf 4' - 1622 / 1984
Open Fluyt 4'
Quintfluyt 3'
Open Fluyt 2'
Super Octaaf 2' - 1622 / 1984
Sexquialter II sterk
Carillon III sterk (discant) - 1787
Cornet V sterk (discant) - 1622 / 1718
Trompet 8' - 1787 / 1984
Vox Humana 8' - 1787 / 1984
Hautbois 8' - 1870

Pedaal:
Praestantbas 32' - 1622 / 1984
Praestant 16'
Bourdon 16'
Octaaf 8'
Gedekt 8'
Octaaf 4'
Bazuyn 16' - 1787 / 1984
Trompet 8' - 1787 / 1984
Clairon 4' - 1787 / 1984
Cornet 2' - 1984

Couplers: Pedaal - Hoofdwerk, Pedaal - Rugwerk, Hoofdwerk - Rugwerk, Hoofdwerk - Bovenwerk, Rugwerk - Hoofdwerk.
Tuning: Equal temperament at a' = 415 Hz
wind pressure: 78mm WC