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Chapter 3 ES2 97
Use FM Drive and Filter FM to change the tonal color
The FM Drive setting illustrates how dramatically the character of FM sounds can be altered
when you apply Drive and Filter FM. The results are reminiscent of the feedback circuits of classic
FM synthesizers.
Do the following:
m Check out dierent Drive and Filter FM settings.
m Lower the Cuto Frequency of Filter 2 to 0. Envelope 2 modulates Filter 2. This modulation
routing is already present in the setting.
Create FM sounds with Digiwaves
In the FM Digiwave setting, a Digiwave is used as an FM modulator. This results in bell-like
spectra from only two operators. With traditional FM synthesis, this type of timbre could normally
be produced only with a larger number of sine oscillators.
To create a fatter, undulating, and atmospheric quality to the sound, the polyphonic Unison
mode has been engaged. Filter and amplitude envelopes have been preset to shape the sound.
Do the following:
m Check out the variety of Digiwaves as FM modulation sources.
m Check out dierent Analog parameter values.
Create FM sounds with wavetables
You can program the most vivid FM sounds when the modulation source morphs between
dierent Digiwaves. The morphing in the FM Digiwave setting is controlled by LFO 2. The tempo
of LFO 2, and therefore the morph, depends on the host application tempo—here, two bars.
Do the following:
m Set LFO 2 to dierent waveforms. Lag S/H (smooth random), in particular, should be fun.
m Check out dierent FM intensities and oscillator frequencies.
m Alter the modulation intensity of the rst modulation routing (LFO2 modulates Osc2 Wave) and
the LFO 2 rate.
Create distorted FM sounds with monophonic unison
The FM Megafat setting is well-suited for distorted basses and guitar-like sounds. This sound gets
rather “rude” in the upper key range. This cannot be compensated for with key scaling, but not
every sound has to be “nice” across the entire keyboard range!
Do the following:
m Check out extreme detunings by adjusting the Analog parameter.
m Check out the Flanger with this sound.
m Engage the lter envelope by lowering the Cuto Frequency of Filter 2 down to 0.
m Add some Glide to lead sounds.
m As always when it comes to FM, you can dramatically alter the sound by varying the frequencies
of the oscillators. Make sure you check out the odd intervals, as well.