Recording Equipment User Manual
The MuRF’s FILTERS
The MuRF’s eight resonant lters have a xed center frequency,
shown on the legend underneath the lters’ 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 lter has a slider that adjusts the gain of that lter. In this
respect, the MuRF resembles a graphic equalizer. When a lter’s
slider is all the way down, the gain for that lter is zero, and the
lter’s output is zero. When the slider is all the way up, the lter’s
output is maximum. However – the resemblance to a graphic EQ
ends there. The MuRF’s lters have characteristics that set them far
apart from a graphic equalizer. First, they are resonant lters. They
boost the signal at the center frequencies of the lters. 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 lters 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 lters affect your MF-105 frequency response.
We will always start with this ‘basic’ panel setup, which is:
1) Set each of the lters’
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
lters.
3) Make sure the effect is on,
and MIX is at 10.
4) Connect just the “left/mono”
output to your amplication.
Figure 5 - Basic Settings for checking out the
lters.