The Bass MuRF or MF-105B, designed for bass guitar players, features a 7-band array of resonant band-pass filters plus a shelving low-pass filter, all of which are modulated by an internal “Animation” sequencer with 24 patterns. Each filter’s gain is controlled by an envelope generator, giving rhythmic timbral effects unlike any other filter pedal. High-impedance input and low-impedance output ensure signal integrity, and the unit accepts expression pedal or CV control over parameters such as RATE and BANK.