Delay Lines

A variety of audio effects and algorithms make use of delay lines. As well, they can be used to efficiently simulate traveling-wave propagation. In this section, we study some properties of delay line systems and consider issues of implementation.

A Digital Delay Line

Implementing Digital Delay Lines

Simulating Sound Wave Propagation

Wave Reflections and ``Echo''

Tapped Delay Lines

Feedforward Comb Filters

Comb filters get their name from the shape of their magnitude response and are important components of audio signal processing networks. It turns out that the acoustic echo model developed earlier is one instance of a feedforward comb filter.

Feedback Comb Filters

Delay Line Interpolation

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