June 2021
Intermediate to advanced
304 pages
9h 2m
English
Content preview from Designing Software Synthesizer Plugins in C++, 2nd Edition
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8 Low Frequency Oscillators
Low Frequency Oscillators (LFOs) belong to the render-group of synth building blocks as they render an output without processing an input signal. LFOs are used as modulation sources that generate relatively slow-moving values used to modulate the parameters of a destination object. Since these oscillators are not used for audio frequencies, they do not suffer from aliasing issues and can be generated with extremely simple equations. They are sometimes called trivial oscillators. The requirements for LFOs and pitched oscillators are summarized as follows:
LFO Requirements:
Frequency range: 0.02 Hz–20.0 Hz (though this is highly variable)
Constructed from simple equations, lookup tables, or piecewise functions ...
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