<div>Tim's proposal seems reasonable but it conflicts with the FLAC documentation that says the channel ordering follows SMPTE/ITU-R recommendations. I think we may be butting up against an area where the standards aren't clear. ITU-R BS.2159-4 (<a href="http://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BS.2159-4-2012-PDF-E.pdf">http://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BS.2159-4-2012-PDF-E.pdf</a>) doesn't define a 7.1 layout but simply diagrams several possibilities on page 27. DTS-HD seems to specify 7 different possible 7.1 layouts (<a href="http://www.scribd.com/doc/17630423/21/Channel-Layout">http://www.scribd.com/doc/17630423/21/Channel-Layout</a>). </div><div><br></div><div>I think my preference for the Apple/Core Audio layouts is known but obviously any standard would be better than none. Do I understand correctly that WAVE_FORMAT_EXTENSIBLE simply defines a standard channel order and FLAC would specify compatible channel masks? <a href="http://msdn.microsoft.com/en-us/library/windows/hardware/gg463006.aspx">http://msdn.microsoft.com/en-us/library/windows/hardware/gg463006.aspx</a> hasn't been updated since 2007 so I may have been looking at an old document.</div><div><br></div><div>Stephen</div>
<p style="color: #A0A0A8;">On Wednesday, January 2, 2013 at 6:54 AM, Erik de Castro Lopo wrote:</p>
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<span><div><div><div>Tim W. wrote:</div><div><br></div><blockquote type="cite"><div><div>I'm personally in favor of mapping (1) as it doesn't vary between 6.1/7.1,</div><div>and is fully compatible with the WAVEFORMATEXTENSIBLE specification.</div></div></blockquote><div><br></div><div>I'm in favour of Tims proposal and intent to apply Ralph's patch</div><div>to implement this unless someone comes up with a really good reason</div><div>not to.</div><div><br></div><div>Erik</div><div>-- </div><div>----------------------------------------------------------------------</div><div>Erik de Castro Lopo</div><div><a href="http://www.mega-nerd.com">http://www.mega-nerd.com</a>/</div><div>_______________________________________________</div><div>flac-dev mailing list</div><div><a href="mailto:flac-dev@xiph.org">flac-dev@xiph.org</a></div><div><a href="http://lists.xiph.org/mailman/listinfo/flac-dev">http://lists.xiph.org/mailman/listinfo/flac-dev</a></div></div></div></span>
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