Toke Tietze Mortensen (born 1979) is a composer as well as a free improviser of the younger generation of the experimental music scene in Copenhagen.

Best known as a member of the yoyooyoy collective, and beheind the drums in constalations such as Fjernsyn Fjernsyn, Sumo Freunds, KCP, Karry Trio, Fossil Ro and Forkert. He is also known as a laptop composer of concrete music, and as a live analog noise performer.

yoyooyoy.dk