Peter Schat composed his Collages for 31-tone organ in 1962, creating one of the most distinctive works for the remarkable Fokker organ. In the movement Clusters, Schat paints an advanced palette of tone colours for his time, which went on to inspire many of his contemporaries. The other works on the programme, by composers such as Eugen Frischknecht, Ivan Wyschnegradsky and Jan van Dijk, were written around the same period as Schat’s composition. In addition to these pieces from the established repertoire, a composition by Felipe Waller for Fokker organ and the 96-tone Carrillo piano will be performed. This work also makes use of clusters, though in a highly playful manner, giving rise to lively musical movements. The work by Leo de Vries, though more recent than Schat’s, also has a historical connection, as de Vries corresponded with Adriaan Fokker during the 1960s. Hector Bravo Benard pays tribute to the cluster with his composition, performed using a laptop.