Expression Pedals And Voltage Control - Moog MIDI MuRF MF-105M Usage Instructions

Figure 12 - Left and Right Frequency
Response of MIDS filters

EXPRESSION PEDALS AND VOLTAGE CONTROL

You now know what each of the rotary controls does to the sound
of the MF-105M. The ENVELOPE, MIX, and RATE controls have
expression pedal/control inputs that duplicate their effects. In addition,
the MF-105M has a LFO/SWEEP input which is used to adjust the speed
of the LFO, or to sweep the frequencies of the filters if the LFO switch is
OFF. This enables you to plug in up to four expression pedals to play the
MF-105M with your feet as well as with your hands. The moogerfooger
EP-2 Expression Pedal and MP-201 Multi-Pedal are both designed
for this purpose. You can also use expression pedals with equivalent
specifications. See the Technical Information section on Page 23 for
more information on pedal specifications.
When you plug an expression pedal into one of the pedal inputs on
your MF-105M, the pedal adds and subtracts half the range to the setting
of the corresponding control. For example, let's say that you plug an
expression pedal into your MF-105M's ENVELOPE input, with the
ENVELOPE control set to 5. With the pedal all the way in the heel
position, the Envelope shape is the same as if the ENVELOPE control
was set to zero. Then, when you advance the pedal, the Envelope shape
begins to morph, just as if you were turning the knob. At halfway, the
pedal equals the setting of the corresponding control, and at full toe
position, it is as if the control is at 10. A good rule to follow is: when
you use an expression pedal, you set the corresponding knob for the
middle value you want. From the middle of the pedal, advancing to toe
of the left and right outputs
when both the left and right
output jacks are used. Note
that the odd-numbered filters
are sent to the left channel,
and the even-numbered filters
are sent to the right channel.
This allows for spreading a
sound's frequencies between
two speakers.
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