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Re: Audio-ISSUE-10 (negative-gain): Negative values suggested for the Audio Gain Node [Web Audio API]

From: olivier Thereaux <olivier.thereaux@bbc.co.uk>
Date: Tue, 24 Apr 2012 10:14:27 +0100
To: Christopher Lowis <Christopher.Lowis@bbc.co.uk>, Audio Working Group <public-audio@w3.org>
Message-Id: <972CD48A-F752-45D3-9D99-368F323610E9@bbc.co.uk>
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


I an moving the issue to "Pending Review" status. Expecting to close it at our call tomorrow if there are no objections. Chris, as the person who raised the issue, are you satisfied with how the spec was amended?

Thanks,
Olivier


On 27 Mar 2012, at 20:09, Audio Working Group Issue Tracker wrote:

> Audio-ISSUE-10 (negative-gain): Negative values suggested for the Audio Gain Node [Web Audio API]
> 
> http://www.w3.org/2011/audio/track/issues/10
> 
> Raised by: Chris Lowis
> On product: Web Audio API
> 
> 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
> 
> 
> 



Received on Tuesday, 24 April 2012 09:14:47 GMT

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