FM AID | 2020 VERSION | USER GUIDE
CAR input signal
Self-patch the MOD input
Output signal
Feedback
Patching
TIPS & TRICKS
Note Velocity
To add extra color to sound, patch velocity voltage to
the CV input, which will change the FM depth (index)
in relation to the velocity of the notes.
Pitch CV Modulation
Pitch CV can be used to vary the FM depth (index)
amount for different pitches:
•Positive CV setting will raise the FM depth (index)
for every higher pitched note.
• Negative CV setting will allow to decrease
the FM depth (index) for higher pitched notes.
Audio Rate Modulation
Audio rate signals can by plugged to CV input as
well—just try it and you will like it.
Hard-Sync
Try using standard, hard-synced oscillators for the
Carrier and Modulator to eliminate the frequency
beating, so the produced FM tone will stay static.
Strengthen the Low End
Increasing the FM depth (index) can shift the harmonic
peaks higher in frequency, weakening the main tone
(first harmonic). To bring back the low end, try any of
these methods:
•Lower the octave of the Carrier.
• Lower the pitch of the Modulator.
• Switch the waveform of the Modulator to a sine
or a triangle.
Feedback
It is known fact, that in digital FM realization, self
feedback is used to produce noise at some feedback
depth settings. This is due to the limited sample rate
in digital realm.
Of course there is no such restriction for analog
implementation of FM AID module. But there is still
limited reset time of standard analog waveforms, so it
is possible to resemble the digital noise generation too.
It is done by sending any of the four outputs to the
Modulator’s input making a feedback path. Each of the
four shapers will give different noise flavors, thus try
them all. Depending on the reset time of the Carrier
signal this noise generation setting will vary, but it will
be somewhere in the “FM” knob range of 6-10 for
most of the signals.
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