Bug 17363 - (BiquadFilterNode): BiquadFilterNode is underdefined
Summary: (BiquadFilterNode): BiquadFilterNode is underdefined
Status: CLOSED WONTFIX
Alias: None
Product: AudioWG - OBSOLETE - Moved to Github
Classification: Unclassified
Component: Web Audio API - OBSOLETE - See Github (show other bugs)
Version: unspecified
Hardware: PC All
: P2 normal
Target Milestone: TBD
Assignee: Chris Rogers
QA Contact: This bug has no owner yet - up for the taking
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-06-05 11:51 UTC by Philip Jägenstedt
Modified: 2014-10-28 17:17 UTC (History)
2 users (show)

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Description Philip Jägenstedt 2012-06-05 11:51:00 UTC
Audio-ISSUE-76 (BiquadFilterNode): BiquadFilterNode is underdefined [Web Audio API]

http://www.w3.org/2011/audio/track/issues/76

Raised by: Philip Jägenstedt
On product: Web Audio API

https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#BiquadFilterNode

The filter operation is undefined, with wording such as "standard second-order resonant lowpass filter with 12dB/octave rolloff." A lot more specificity is required.

Wikipedia is the reference for several of the filter modes. We could not find any mode that is implementable given the information provided.
Comment 1 Olivier Thereaux 2013-04-03 08:17:33 UTC
Per discussion at Audio WG f2f 2013-03-26

We discussed how much of the maths should be specified for the BiquadFilterNode.

The consensus:

* remove the wikipedia links (they can be used in developer documentation)
* publish a stable version of RBJ's Audio Cookbook and refer to that

See - http://lists.w3.org/Archives/Public/public-audio/2013AprJun/0006.html
Comment 2 Olivier Thereaux 2014-10-28 17:14:58 UTC
Web Audio API issues have been migrated to Github. 
See https://github.com/WebAudio/web-audio-api/issues
Comment 3 Olivier Thereaux 2014-10-28 17:17:57 UTC
Closing. See https://github.com/WebAudio/web-audio-api/issues for up to date list of issues for the Web Audio API.