Jacob Felix Heule is based in Oakland, California, and is an audio engineer and improvising percussionist with a special interest in friction techniques. His music is shaped by intuition and listening . He embraces limited instrumentation – like a single drum and a single cymbal – as a commitment to exploring the depth of his instruments, and to force the instruments' logic to access a state of sound not yet explored. Jacob frequently collaborates, with Danishta Rivero and Guro Moe amongst others. He also organises the monthly improvisation workshop, Doors That Only Open in Silence in Oakland, California.