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title: Passive RC Filter
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Using a small amount of components an Low or High Pass Filter can be built. This passive filter filters out unwanted frequencies, to create the swooooooooooshh sound.

Hopefully, this schematic is somewhat easy to build, and therefore I expect that this recipe will be combined with the single-transistor-oscillator recipe.

The selected Capacitor & Resistor decide at which point specifically the filter is cut off.

## Schematics

![Schematic of a Passive Low Pass Filter](https://www.electronics-tutorials.ws/wp-content/uploads/2013/08/fil5.gif?fit=326%2C161?fit=326,226)

![Schematic of a Passive High Pass Filter](https://www.electronics-tutorials.ws/wp-content/uploads/2018/05/filter-fil11.gif)

## Components

- A Capacitor
- A Resistor

## Sound Examples

TODO

## Images

TODO

## Used In

TODO
