The masterful improviser and composer Guus Janssen will perform on the microtonal Fokker organ during this concert, making use of both a 12-tone keyboard and the 31-tone manual. Special guest is clarinettist/saxophonist David Kweksilber, with whom Janssen has frequently collaborated in recent years and who will musically accompany him during several improvisations. For this programme, Janssen will select works by John Bull, Duke Ellington, and himself. In addition, a composition by Kweksilber will be performed, alongside improvisations on a micromodal blues and in an ‘untamed’ tuning. Exclusively for this concert, Janssen has composed several themes for the Fokker organ, through which he will explore the possibilities of improvising with microtonality. If you want to discover where this leads and are in search of a different sound, this exciting and unpredictable concert is not to be missed!