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Re: Audio-ISSUE-95 (ChannelLayouts): Channel Layouts are not sufficiently defined [Web Audio API]

From: Philip Jägenstedt <philipj@opera.com>
Date: Fri, 18 May 2012 16:26:00 +0200
To: public-audio@w3.org, "Audio Working Group Issue Tracker" <sysbot+tracker@w3.org>
Message-ID: <op.weic1mdnsr6mfa@kirk>
On Fri, 18 May 2012 16:19:38 +0200, Audio Working Group Issue Tracker  
<sysbot+tracker@w3.org> wrote:

> Audio-ISSUE-95 (ChannelLayouts): Channel Layouts are not sufficiently  
> defined [Web Audio API]
>
> http://www.w3.org/2011/audio/track/issues/95
>
> Raised by: Philip Jägenstedt
> On product: Web Audio API
>
> https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#ChannelLayouts
>
> This section admits that "Other layouts can also be considered." It  
> should be defined exactly which channel configurations must be supported.
>
> It would also be desirable with a terminology section to include things  
> like the channel abbreviations (M/L/R/SL/SR/C/LFE) and less obvious  
> channel configurations like "Quad".

One somewhat worrying aspect of channel configurations we just discovered  
is that a channel number doesn't always correspond to the same logical  
channel. In particular, Quad channel 2 is "surround left" while 5.1  
channel 2 is "center". For everything above mono, it seems like we can and  
should use the same indexes for the same channel.

-- 
Philip Jägenstedt
Core Developer
Opera Software
Received on Friday, 18 May 2012 14:26:26 GMT

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