MAKE THIS CONNECTION
For one FM voice our goal is to use
Oscillator 2 to Frequency Modulate (or
FM) Oscillator 1. A crude way of doing this
would be to patch Oscillator 2’s WAVE
OUT output to Oscillator 1’s PITCH IN
input.
Turn down all channels in the mixer
except for OSCILLATOR 1 and press a
note. Compare how the sound changes
as you press the key, removing the patch
connection and then repatching. You’ll
notice that with Oscillator 2 patched to
the PITCH IN the tone is way too low
and pretty abby. This has to do with the
PITCH IN input having an exponential
response, which works well for pitch and
keyboard information, but not as well
when doing FM synthesis.
MAKE THIS CONNECTION
Instead try patching Oscillator 2 WAVE
OUT output to Oscillator 1’s LIN FM IN
input.
You’ll notice now a very bright tone–one
full of overtones. By changing the value
of the OCTAVE switch of Oscillator 2
you change the relationship between the
carrier (Oscillator 1) and the modulator
(Oscillator 2) and thus change the color
of the sound. This might be too bright of
a tone, however, and you’ll want to adjust
the FM depth. Just as before, it is time to
use an attenuator.
2-Operator Analog FM Synthesis | 15
To Next Page
Loading...
