Viper MF-105B warranty

Figure 8 - Resonant Frequency shift

done two ways, depending on the position of the BANK slider switch. The switch, located below the PATTERN selector switch is labeled BANK A or B/LFO. When the slider is in the “A” position, the filters’ center frequencies can be shifted by an expression pedal (such as the Moog EP-1) or CV plugged into the LFO/SWEEP Jack.

To hear how this works, return to the basic setup described in Figure 5. Plug a Moog EP-1 into the LFO/SWEEP control input.

Then, as you play

into the Bass MuRF, rock the EP-1 back and forth. You will

hear the filters’ frequencies shift with the motion of the pedal.

When the BANK slide switch is in the B/LFO position, an LFO (Low Frequency Oscillator) shifts the frequencies of the filters as a group up and down automatically. The LFO is a sine wave. The rate is determined by the pattern, or an expression pedal (EP-1 or equivalent) or CV connected to the LFO/SWEEP jack.

To hear the effect of the LFO on the Bass MuRF’s filters, return to the basic setup outlined in figure 5, then move the BANK slider switch to “B/LFO”. Now as you play through the Bass MuRF, you’ll hear the filters swept up and down automatically. To change the speed of the LFO, plug a Moog EP-1 expression pedal into the LFO/SWEEP Control Input. The EP-1 can now slow down or speed up the LFO.