The feedback double bass is an instrument developed in the summer of 2018. 

By routing contact pickups to contact exciters attached to the double bass, the instrument becomes a speaker membrane that amplifies its own signal. Consequently, a complex feedback loop is created that the player can interact with by placing her hands on the instrument, thereby altering its resonant properties. Additionally, volume and processing parameters in the signal chain can be changed with the help of a controller.

The feedback bass is a complex system that exhibits semi-chaotic behaviour. The player is advised to relinquish ambitions for total musical control and instead focus on immediacy and bodily intuition in the interplay with this vibrant object.