c-media 8738-MC6

Alexander Leidinger Alexander at Leidinger.net
Mon Dec 5 04:54:37 PST 2005

Todor Aleksandrov <yodor at developer.bg> wrote:

> Alexander Leidinger wrote:
>> Todor Aleksandrov <yodor at developer.bg> wrote:
>>> I have a box with cmedia 8738-mc6 pci card. I can get only stereo 
>>> playback with it, while the card is supporting 5.1 channels. Works 
>>> fine on linux using mplayer -channels 6 ...
>>> I've appied the patch from  http://people.freebsd.org/~ariff/
>>> I can get the new sampling rates working. Is there any chance I can 
>>> get this card running in multichannel 5.1 mode ?
>> ONly if you want to contribute the necessary code...

> I dont know if I'm ready to contribute, but I would love to. I got 
> the sources of the original driver for linux from c-media and also 
> the alsa. I was wondering if there is something to do with the ac97 
> code in freebsd?

The linux code is not of help, since you are not allowed to copy it into the
FreeBSD code.

Regarding the FreeBSD side of things: as far as I know, the sound system
infrastructure needs to be extended to know about more than two channels per
output device. But I better let other people which know more about the
internals of the sound system than me comment in this.


http://www.Leidinger.net  Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org     netchild @ FreeBSD.org  : PGP ID = 72077137
How wonderful opera would be if there were no singers.

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