Positive Grid RIFF is a super-portable, mobile-phone-sized USB guitar interface and software combo. Transform any computer, tablet or phone into a raging guitar rig when you connect to the included BIAS FX 2 software or use the three onboard preamp emulations to get clean and overdriven tones directly from RIFF. A direct mode is offered for zero-latency tracking. RIFF operations are incredibly easy, as one knob controls all functions. Want more sonic power? Guitar Match transforms your personal instrument into realistic simulations of the legendary guitars of the 1950s and '60s or go for modern tone machines.