Owner's manual

To hear the effect of changing the carrier oscillator frequency, first set up your MF-102
as follows:
AMOUNT 0
RATE (doesn’t matter)
MIX 10
FREQUENCY 30/0.6
Left Switch (doesn’t matter)
Right Switch LO
Connect your instrument and monitor amp to your MF-102, set the stomp switch so the
BYPASS light is green, and play a few simple, sustained notes. You will hear your
instrument sound with a slow, smooth tremelo. Your instrument will get soft and loud
twice for each cycle of the carrier oscillator.
Now turn the FREQUENCY knob up one mark, and play the notes again. You will hear
the tremelo get faster, Technically speaking, even at this low carrier frequency, your
music signal is split into two sets of harmonics. However, the frequency difference
between the two sets is so small that you really don’t hear them as difference pitches.
Continue to turn up the FREQUENCY control, one mark at a time, playing a few
simple, sustained notes at each mark. You will hear the tremelo get faster and faster.
When the carrier frequency is above 20 Hz or so, the MF-102 output will no longer sound
like a tremelo. Instead, your sound will begin to sound “rough” and “detuned” because
the two sets of harmonics are far enough apart so you begin to hear them as two
distinct sounds.
When the FREQUENCY control is as far clockwise as it will go, turn it all the way back
and set the switch on HI. Continue to play simple, sustained notes while turning the
FREQUENCY control clockwise. Listen carefully. You will hear some pitches going up (the
sum frequencies) and some going down (the difference frequencies).
What happens when a difference frequency gets down to zero and you continue to
turn the carrier frequency up? Technically speaking, the difference frequency then
becomes negative. But as far as our ears are concerned, a negative frequency sounds
just about the same as a positive frequency! So, as you continue to turn the carrier
frequency up while you’re playing, you’ll hear the difference frequencies first go down,
then start to come up, one by one. When the carrier frequency is up around 4 kHz,
nearly all of the output sound will be very high pitched, even if you play low-pitched
notes on your instrument.
WHAT IS THE LFO, AND WHAT DOES IT DO?
LFO stands for Low Frequency Oscillator. LFO’s are generally used to create slow
modulations such as vibrato and tremelo. The LFO in your MF-102 is a wide-range,