ISSUE-10: (Bugzilla 17421) Negative values suggested for the Audio Gain Node
negative-gain
(Bugzilla 17421) Negative values suggested for the Audio Gain Node
- State:
- CLOSED
- Product:
- Web Audio API
- Raised by:
- Chris Lowis
- Opened on:
- 2012-03-27
- Description:
- Chris Lowis suggests that a negative value for the Audio Gain Node would be useful. Chris Rogers agrees.
To add some detail around this suggestion: allowing a negative gain allows developers to create a "phase-inversion", which is a very useful feature, *not-limited* to the following uses: in music production - helping add clarity by positioning sounds in the stereo field, for noise reduction - cleaning up signals that have too much echo, and for use in general surround sound signal processing.
http://lists.w3.org/Archives/Public/public-audio/2012JanMar/0489.html - Related Actions Items:
- No related actions
- Related emails:
- [web-audio-api] Negative values suggested for the Audio Gain Node (#228) (from notifications@github.com on 2013-09-11)
- [Bug 17421] New: Negative values suggested for the Audio Gain Node (from bugzilla@jessica.w3.org on 2012-06-05)
- RE: Minutes of audio WG teleconference, 2012-04-25 (from james.wei@intel.com on 2012-04-26)
- Minutes of audio WG teleconference, 2012-04-25 (from olivier.thereaux@bbc.co.uk on 2012-04-26)
- [Agenda] W3C Audio WG Teleconference, 25th April 2012 (from olivier.thereaux@bbc.co.uk on 2012-04-24)
- Re: Audio-ISSUE-10 (negative-gain): Negative values suggested for the Audio Gain Node [Web Audio API] (from olivier.thereaux@bbc.co.uk on 2012-04-24)
- Audio-ISSUE-10 (negative-gain): Negative values suggested for the Audio Gain Node [Web Audio API] (from sysbot+tracker@w3.org on 2012-03-27)
Related notes:
This issue appears to be solved by this changeset:
https://dvcs.w3.org/hg/audio/rev/908b6b7b8702#l1.174
The new text says:
«This interface is a particular type of AudioParam which specifically controls the gain (volume) of some aspect of the audio processing. The unit type is "linear gain". The nominal minValue is 0, but may be set negative for phase inversion. The nominal maxValue is 1, but higher values are allowed (no exception thrown).»
https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioGain-section
Resolution: Close ISSUE-10, as recent changes to the ED of web audio API satisfy the group's requirements.
25 Apr 2012: http://lists.w3.org/Archives/Public/public-audio/2012AprJun/0060.html
Resolution: Close ISSUE-10, as recent changes to the ED of web audio API satisfy the group's requirements.
25 Apr 2012: http://lists.w3.org/Archives/Public/public-audio/2012AprJun/0060.html
Migrated to Bugzilla:
https://www.w3.org/Bugs/Public/show_bug.cgi?id=17421
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