Derek van Beelen a.k.a. "D." (The name Disinvalid), is a passionate jazzfusion drummer and multi-instrumentalist hailing from Amsterdam. As a producer and performer, he fuses eclectic acoustics with electronic elements, leading to adventurous and mesmerising soundscapes that veer into techno territories.
Next to being San Proper's drummer and wingman in the past years, he played in a wide variety of acts, ranging from metal to groups-jazz. D. remains quiet, as his focus is to bring music within the health care sector and the projects.