Re: [Openvortex-dev] enabling headphone output on mx300

[Manuel Jander]

Hi,
 
> When you say the "Headphone" output, is it the duplicate of the other
> output, or was it implemeted as a separate PCM devices (/dev/dsp2 or
> whatever)?

It is a copy of a stereo stream, if the playback channel is stereo. If
the playback channel is quad, it should be the other two channels. Any
of the 16 or 8 (depends on what card) can be mono, stereo or quad, if
there are sufficient codec outputs.
 
> Manuel, was that true for you too?  If that is the case, perhaps the
> MX300 is wired differently from the SQ2500 after all.  I keep saying
> I'll try my MX300 but never have a chance to take my system down to do
> it. :)
> 

That depends. There are two ways to copy a stereo stream to the
headphone outputs. It can be done using the Aureal Mixers, or using a
feature of the STAC9708 codec. Unfortunately that "feature" doesnt work
on my MX300. I have no idea why. The binary driver uses the first method
(using the aureal digital mixer, i mean "CAsp4Mix" objects).

Best Regards

Manuel Jander

-- 
Universidad Tecnica Federico Santa Maria - CHILE.
http://www.utfsm.cl