A Flanger is an effects pedal that simulates two identical signals that are mixed together, but with one signal time-delayed by a small and gradually changing amount, usually smaller than 20 milliseconds. This was originally created using two tape decks but can now be done digitally using a free and open-source program called Audacity.

Step 1: What You Will Need

You will need:

A computer capable of running Audacity (Linux, Windows, or Mac)


Dual Tape Decks Audacity Nyquist Plug-In (dualtapedecks.ny)

Stereo Butterfly (static) Audacity Nyquist Plug-In (buttrfly.ny)

A guitar recording (can be done in Audacity)

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