[MPlayer-users] Re: [BUG] Wrong audio channel mapping when playing WMV3/WMVHD files

[Corey Hickey]

Frank Aurich wrote:
>>> I did some digging and found the WMA channel mapping to be (supposedly):
>>>
>>> FL FR C LFE SL SR
>> Did you find this in some documentation somewhere? If so, can you send a
>> URL? It would be useful for adding support for remapping other
>> configurations, such as 5.0 and 4.0.
>>
>> -Corey
> 
> I found this tool on Microsofts website:
> http://www.microsoft.com/downloads/details.aspx?FamilyId=49A52710-78C1-4CB4-B94F-682E338062CC&displaylang=en
> Microsoft Windows Media Audio 9 Professional Channel Mask Mapping Tool
> 
> It's in-built helpfile lists these mappings:
> 
> 4.0: FL FR BL BR
> 4.0: FL FR SL SR
> 5.0: FL FR C BL BR
> 5.1: FL FR C LFE BL BR
> 5.1: FL FR C LFE SL SR
> 6.1: FL FR C LFE BL BR BC
> 7.1: FL FR C LFE BL BR SL SR
> 7.1: FL FR C LFE BL BR FLOC FROC

Thanks, that's helpful.

> I'm not really sure what the difference is between BL/BR (back left/right) and 
> SL/SR (surround left/right).

I think it's (usually) approximately like this for 7 speakers:

   FL   C   FR


 SL     X     SR


   BL      BR


...and like this for 5 speakers:

   FL   C   FR


        X

   SL       SR


...where 5.x setups often have the surround speakers a little rearward.

-Corey