The Filter shapes a sound by boosting or reducing the level of selected frequencies.

Filter is a post-effect. It shapes the audio of any connected Source blocks by boosting or reducing the level of frequencies around an adjustable “center-frequency”, acting like a frequency-specific volume knob. It’s a “peaking” type filter.

adjusting frequencies like this alters the tone or character of the sound, allowing more low frequencies pass creates more bass, and higher frequencies more treble. Boosting frequencies of audible pitches creates resonance. A filter can only boost or reduce frequencies already present in the original audio.

In options, ‘Frequency’ is the “center-frequency” around which the frequencies will be affected. ‘Gain’ is the amount those frequencies are boosted or reduced.

Last updated: 13/04/2016


What is BlokDust?

BlokDust is a free to use web-based music making app. Build sounds or instruments and share your creations.

What is this?

This site serves as a wiki/user companion to, as well as a hub for tutorials and other related features.


Chrome browser recommended, desktop or tablet and an internet connection. If you have one, use a MIDI key controller for the best experience!