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Chapter 3 ES2 39
The net eect of speeding up or slowing down the frequency of oscillator 1 in each waveform
cycle is a distortion of the basic wave shape. This waveform distortion also has the side benet of
introducing a number of new, audible harmonics.
Important: The impact of any frequency modulations you perform depends on both the
frequency ratio and the modulation intensity of the two oscillators.
The “pure” FM synthesis method uses a sine wave for both the rst and second signal generator
(both oscillator 1 and 2 would be limited to generating a sine wave in ES2 if you stuck with this
approach). ES2, however, provides 100 Digiwaves and countless combinations of modulation
intensities and frequency ratios that can be used for either oscillator. This provides a vast pool of
harmonic spectra and tonal colors for you to experiment with.
Tip: The type of modulation that occurs can vary signicantly when dierent waveforms are
chosen for oscillator 2—the modulating oscillator—in particular.
Set the frequency ratio and adjust the modulation intensity
1 Adjust the Frequency (coarse and ne tune) parameter values of one, or both, oscillators.
2 Click (or drag) in the control range between the Sine and FM icons around the oscillator 1 Wave
knob.
This determines the amount, or intensity, of frequency modulation.