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 15Modulated Delay Effects
Perhaps the most interesting kinds of audio effects, from both listening and engineering standpoints, are the modulated delay effects. They include the chorus, flanger, and vibrato; additionally, modulated delays are also found in some reverb algorithms. These time-varying filters are actually quite sophisticated and fun to implement. We already have C++ objects designed for audio delays with circular buffers, and LFOs. These are key ingredients for modulated delay effects. Figure 15.1a shows the standard delay line with feedback. The delay is constant until the user changes it to another fixed value. In the modulated delay line in Figure 15.1b the amount of delay is constantly changing over time. The system ...
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