[MPlayer-users] Mac OS X Audio 5.1 Channel Output Problems

[Dominik 'Rathann' Mierzejewski]

On Thursday, 17 January 2008 at 11:07, Reimar Döffinger wrote:
> Hello,
> On Thu, Jan 17, 2008 at 01:45:40AM -0800, galenz at zinkconsulting.com wrote:
> [...]
> > However, this is extremely un-Mac like and un-intuitive, given the  
> > available data. The Apple audio API automatically detects the number  
> > of channels physically available. The macosx audio out module should  
> > pass this value along to mplayer and set the number of channels  
> > accordingly.
> 
> I am not aware that there are any sound cards that can detect whether 2,
> 4, 6 or 8 speakers are connected to them. Does Apple have some special
> hardware there?

No. Actually most (even cheap onboard) sound cards have been able to do
that for a couple of years now.

> > This is what I mean about mplayer not detecting the multple channels.  
> > Various other applications - such as QuickTime Player and VLC - rely  
> > upon detecting available channels in this manner and make audio  
> > conversion/output settings accordingly.
> 
> I'm almost certain that they behave exactly like MPlayer with channels=6
> at the expense of giving wrong output for those who only connect two
> speakers then.

Don't bet on it. ;)

Regards,
R.

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