<div dir="ltr">Maybe I don't understand you correctly, but 0000 is mono, not undefined. It says: 0000-0111 : (number of independent channels)-1<div><br></div><div>I agree that the use of WAVEFORMATEXTENSIBLE_CHANNEL_MASK should be documented. I can probably take a look at it this week or so, if no one hasn't already?</div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-07-05 13:54 GMT+02:00 lvqcl <span dir="ltr"><<a href="mailto:lvqcl.mail@gmail.com" target="_blank">lvqcl.mail@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">An issue was raised at <<a href="http://forum.doom9.org/showthread.php?p=1728923#post1728923" rel="noreferrer" target="_blank">http://forum.doom9.org/showthread.php?p=1728923#post1728923</a>> -<br>
FLAC uses WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag to describe non-standard layout,<br>
but it isn't mentioned anywhere in FLAC format.<br>
<br>
Channel assignment is described at <<a href="https://xiph.org/flac/format.html#frame_header" rel="noreferrer" target="_blank">https://xiph.org/flac/format.html#frame_header</a>>:<br>
"Where defined, the channel order follows SMPTE/ITU-R recommendations."<br>
<br>
The undefined value (0000?) is not mentioned. And no mentions that FLAC can<br>
store channel assignment in WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag, and how and<br>
when to use it.<br>
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