May 2019
Intermediate to advanced
704 pages
21h 21m
English
Content preview from Designing Audio Effect Plugins in C++, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 13Modulators: LFOs and Envelope Detectors
The basic definition of “modulate” is to change something. In our plugins, we will use modulators to alter plugin parameters in real time on a constant update basis. This means that our plugin parameters will undergo a constant updating of their values and we will generally make updates on every sample interval. Modulators will take static plugins like filters and delays and turn them into dynamic time-varying processors such as envelope followers and chorus/flanger/vibrato devices. There are two fundamental kinds of modulators we will use in our FX plugins: LFOs and envelope detectors (or simply detectors). LFOs generate time-varying waveforms such as sine, sawtooth, and triangle with relatively ...
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