Recording Equipment User Manual

The pedal cable should be shielded, with the shield connected to
the sleeve terminal. See Figure 14.
When connecting one or more pedal control input jacks to a
source of external control voltage such as an analog synth or a
MIDI-to-CV converter, you should use patch cords with tip-ring-
sleeve phone plugs. The ring terminal on the plug should not be
connected to anything, so that the MF-105’s source of +5 volts is
Figure 14 – Correct wiring for an expression
pedal
An expression pedal for
use with the MF-105 should
contain a 50KW or 100KW
potentiometer which is
connected from the sleeve
to the ring terminals. The
potentiometer wiper is
connected to the tip terminal.
Figure 15 – Correct wiring for a TRS CV
patch
not shorted out. Or, if you do
not plan to use any expression
pedals with your MF-105 but
would like to apply control
voltages to one or more pedal
control inputs, you can use
patch cords with regular two-
conductor phone plugs. These
will short out the +5 volt supply to the ring contacts. This voltage
is current-limited, so you won’t burn anything out, - but no pedal
will work in any of the pedal control jacks if a tip-sleeve plug is
plugged into even one of the pedal jacks.
Applying a varying voltage to the tip terminal of a pedal control
input jack has the same effect as turning the corresponding knob.
A voltage change of about 5 volts at the tip terminal is equivalent
to turning the corresponding knob through its entire range. You
can ‘program’ your MF-105 performance parameters entirely from
external control voltages, by turning the ENVELOPE, MIX, and
RATE control knobs to 5, and feeding 0 to +5 Volt programming
voltages to the tips of the pedal control input jacks. The LFO/
SWEEP jack can also receive 0 to +5 Volt programming voltages.