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238 Chapter 22 ES2
Synchronized sawtooth wave as output by Oscillator 2. Oscillator 1 is set to 0, Oscillator
2 to + 22 semitones. The dots in the graphic indicate the phases of Oscillator 1.
Synchronized rectangular wave as output by Oscillator 2. Oscillator 1 is set to 0,
Oscillator 2 to + 22 semitones. The dots in the graphic indicate the phases of Oscillator
1.
Output signal of Oscillator 2 (sawtooth), synchronized to Oscillator 1. The frequency of
Oscillator 2 is modulated by an envelope generator, changing the duration of the
phases over time. On the right-hand side, the sawtooth shapes are broader, due to the
sinking frequency of Oscillator 2.
At regular intervals, defined by the phase duration of Oscillator 1, the waveform is
forced back to its beginning. The dots in the graphic indicate the phases of Oscillator 1.
The distance between these dots remains constant, as the frequency of Oscillator 1 is
not being modulated.
Synchronized oscillator sounds are especially cool when the frequency of the
synchronized oscillator is modulated by an envelope generator. This way, the number
of phases within a section (phase) of the synchronization cycle always changes, and so
does the spectrum. Typical oscillator sync sounds tend towards the aggressive,
screaming leads that synthesizer manufacturers like to talk about.
Ring (Ring Modulation)
The waveform control of Oscillator 2 also features the Ring setting. In this mode,
Oscillator 2 outputs the signal of a ring modulator. This ring modulator is fed with the
output signal of Oscillator 1 and a square wave of Oscillator 2. The pulse width of this
square wave can be modulated.