Delay-Based Effects

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Max Cookbook Examples

Many audio effects require use of a time-delayed copy of a sound: for creating an echo effect, for simulating room reverberation, for filtering (changing the frequency content of a sound), and for a variety of other delay-based effects such as flanging, chorusing, Doppler shift, etc. Here are some examples in the Max Cookbook that demonstrate various delay-based effects.

Basic Delay

• Simple delay of audio signal - demonstrates the delay~ object
• DIY ring buffer - shows how you could build your own delay in Max/MSP
• Delay with tempo-relative timing - using the transport's time value syntax to specify delay time
• Delay with feedback - how to feed the dealyed sound back into the delay loop

Flanging

• Simple flanging - time-varying delay
• Flanging explained - further explanation of the theory and technique
• Abstraction for flanging - a reusable subpatch to achieve the flanging effect

Filtering

• Resonant lowpass filter - a basic adjustable lowpass filter
• Bandpass filter swept with a LFO - using an LFO control signal to change the center frequency of a filter
• Biquad filter - a very versatile variable (two-pole, two-zero) filter object
• Comb filter - explanation/demonstration of a comb filter
• Adjust the pitch of a comb filter - imposing a pitched resonance with feedback delay

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This page is by Christopher Dobrian, dobrian@uci.edu.
Last modified May 7, 2019.