Interactive computer music improvisation duo "interface" creates sonic textures ranging from delicate imperceptible noise to a high energy wall of sound. They have extended, surrounded, and obscured their electric stringed instruments with a variety of technologies, creating an organic, gesturally powerful computer music. Curtis plays the SBass, a 5-string "vertical bass" (like an acoustic bass with no body) fitted with electrical pickups, motion, touch and pressure sensors which allow him to "drive" his computer during performance. Dan plays a 6-string electric violin and an electric bow of his own design; the RBow is a normal violin bow covered with motion and pressure sensors that send performance information to Dan's computer performance system.

Their instruments are dynamic, changing constantly from performance to performance and within performances. Recently, they have begun to integrate spherical speaker arrays, which radiate sound in all directions, into their performance set-up. Interface has a commitment to free-improvisation and electronic music composition. They create real-time sonic environments in performance which combine pre-composed electronic sounds with real-time digital signal processing, synthesis, algorithmic composition, and sampling.