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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 UTC

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