Tremolo effect with Pure Data

In this post i’ll show you how to create a patch that works like a tremolo pedal for guitar.

The basic principle is quite simple. You get the sound from your guitar through the soundcard and the [adc~] object, and you multiply it by the output of an oscillator. This output is tuned so that the signal of the guitar is multiplied by a number oscillating between 0 and 1 (at maximal depth), or more generally between x and 1 (0 < x < 1). As the value of the oscillator approaches its minimum, the signal is multiplied by a smaller value and diminishes in volume. And as the value increases to its maximum, the volume goes up again.

Here’s a screenshot of the patch :

Be sure to move every slider when you open the patch to initialize the tremolo.

• If you’re very lazy you can download the patch directly by clicking here.
• And finally, a short audio sample

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