WebAudio: New lowpass and highpass BiquadFilter implementation

The existing lowpass and highpass BiquadFilter implementation has a defect where valid filters cannot be represented. To fix this, the filter formulas were updated. However, the new formulas will cause a change in the output of the filters.

Demos

• https://github.com/GoogleChrome/web-audio-samples/wiki/Detection-of-lowpass-BiquadFilter-implementation
• https://rtoy.github.io/webaudio-hacks/more/biquad/biquad-lowpass-q.html?usedB=true

Documentation

• http://webaudio.github.io/web-audio-api/#filters-characteristics

Specification

Editor's draft

Status in Chromium

Blink components: Blink

Enabled by default (launch bug) in:

• Chrome for desktop release 53
• Chrome for Android release 53
• Chrome for iOS release 53
• Android WebView release 53
• Opera release 40
• Opera for Android release 40

Consensus & Standardization

• Firefox: No public signals
• Edge: No public signals
• Safari: No public signals
• Web Developers: No signals

Owners

• rtoy@chromium.org
• hongchan@chromium.org

Last updated on 2017-06-14