On 7/16/15, Martin Leese <[email protected]> wrote: > Martijn van Beurden wrote: >> I would propose: 0000-0111 : (number of independent channels)-1. >> The channel order is defined through the >> WAVEFORMATEXTENSIBLE_CHANNEL_MASK vorbis comment, if defined. If >> no WAVEFORMATEXTENSIBLE_CHANNEL_MASK is present, the channel >> order follows SMPTE/ITU-R recommendations, which are as follows: > > This looks like an excellent proposal.
I tried to find the specific SMPTE/ITU-R recommendation on channel order. I found a reference to "ITU-R BR.138", but this is not available from the ITU-R Recommendations website. Does anybody have a copy of this? I found lots of places which state the SMPTE/ITU-R recommendation on channel order. But all these are only for 5.1, and are the usual front left, front right, front center, LFE, surround left, surround right. I therefore suspect the SMPTE/ITU-R recommendation is only for 5.1. With this in mind, I now propose the following wording in the FLAC spec: 0000-0111 : (number of independent channels)-1. The channel assignment and order is defined through the WAVEFORMATEXTENSIBLE_CHANNEL_MASK FLAC tag. If no WAVEFORMATEXTENSIBLE_CHANNEL_MASK is present, the channel assignment and order follow SMPTE/ITU-R recommendations (where defined) and are as follows: Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/ _______________________________________________ flac-dev mailing list [email protected] http://lists.xiph.org/mailman/listinfo/flac-dev
