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Chapter 14. Audio Effect Plug-Ins > Varying Pitch with ModDelay

Varying Pitch with ModDelay

ModDelay is useful for more than just learning about tempo-based parameters or creating simple repeats. The Mod in ModDelay stands for modulation, which plays a significant role in many different kinds of effects. Modulation is the automatic changing of the value of a particular parameter over time. A simple modulator is the speed setting on a tremolo effect: the volume of the signal is changed more slowly or quickly according to that speed setting.

ModDelay uses pitch modulation to add to what the effect can do. Classic delay units, like tape delays and analog chip-based delays, change the pitch of the delayed signal if the delay time changes. This makes sense in the example of a tape delay; one way to change the delay time of a tape delay is to speed up the tape, which, of course, will temporarily increase the pitch of the repeats.


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