Moog Music Recording Equipment MF-105 ユーザーズマニュアル

The MuRF’s FILTERS 

    The MuRF’s eight resonant filters have a fixed center frequency, 

shown on the legend underneath the filters’ sliders. Their 

frequencies are: 200 Hz, 300 Hz, 450 Hz, 675 Hz, 1 KHz, 1.5 KHz, 

2.2 KHz, and 3.4 KHz. 

    Each filter has a slider that adjusts the gain of that filter. In this 

respect, the MuRF resembles a graphic equalizer. When a filter’s 

slider is all the way down, the gain for that filter is zero, and the 

filter’s output is zero. When the slider is all the way up, the filter’s 

output is maximum. However – the resemblance to a graphic EQ 

ends there. The MuRF’s filters have characteristics that set them far 

apart from a graphic equalizer. First, they are resonant filters. They 

boost the signal at the center frequencies of the filters. Second, 

they are tuned so they don’t overlap. A graphic equalizer will 

theoretically not color the signal at all when all the sliders are set to 

the same level. The MuRF’s resonant filters on the other hand color 

the signal a great deal, adding warm analog resonances at pleasing 

intervals through out the frequency spectrum.  We’ll now show 

how the MuRF’s filters affect your MF-105 frequency response. 

We will always start with this ‘basic’ panel setup, which is:

1) Set each of the filters’ 

sliders to all the way up.

2) Switch the PATTERN to 

Bank A, Pattern 1. Pattern 1 

turns off the Animation so you 

can hear the effect of just the 

filters.

3) Make sure the effect is on, 

and MIX is at 10. 

4) Connect just the “left/mono” 

output to your amplification.

Figure 5 - Basic Settings for checking out the 

filters.