After World War II Dissevelt moved to Indonesia with the Jos Cleber Orchestra to work.
In 1947 he went on an international tour with Wessel Ilcken, the husband of Rita Reys, and the orchestra of Piet van Dijk.
Dissevelt became interested in twelve-tone serialism, listened to the many German radio stations, and heard works by Karlheinz Stockhausen and Anton Webern.
Recommended by Philips in 1958, he was invited to Natlab, where together with Dick Raaijmakers, aka Kid Baltan, he composed and recorded electronic music.
He then resolved to become an assistant to renowned Dutch entertainers such as Wim Sonneveld and Toon Hermans.