Or, if you do not plan to use any expression pedals with your MF-102 but would
like to apply control voltages to one or more pedal control inputs, you can use
patch cords with regular two-conductor (tip-sleeve) phone plugs. These will short
out the +5.7 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-102 entirely from external control
voltages, by turning all four control knobs (but not the DRIVE knob)
counterclockwise, and feeding 0 to +5Volt programming voltages to the tips of
the four pedal control input jacks.
AUDIO PATH:
Both the bypassed and the filtered signals go through voltage-
controlled amplifier circuits inside the MF-102. This is necessary to permit
voltage-controlled mixing and smooth, clickless smitching. As a result, the MF-
102 will not pass an audio signal at all unless power is applied to it.
Another result of this arrangement is that the strength of the audio output
signal depends on the setting of the DRIVE control, even when the MF-102 is
switched to BYPASS. The nominal audio output level with the LEVEL light in the
yellow is about 0.5 volts RMS.
