Gargle Filter Sample

Gargle Filter Sample

The Gargle Filter is an audio effect transform filter.

This sample is included with the Windows SDK. It is located under the following path: [SDK Root]\Samples\Multimedia\DirectShow\Filters\Gargle.

The Gargle filter modulates the waveform passing through it by multiplying the waveform by another waveform that is mathematically generated within the filter. The modulating waveform is, by default, a triangular wave. The property sheet also offers the alternative of a square wave. You can set the frequency of the modulating wave through the filter's property sheet. At low modulation frequencies, the effect sounds like a tremolo. At higher modulation frequencies, it sounds like a distortion, adding extra frequencies above and below the original unmodulated sound.

See Also

• DirectShow Samples