Ah!
Looking harder, I found out that it does not currently support it.
How easy would it be to support it ?
See some details below, taken from the emu10k1 creative driver.

alsa-driver/sound/em10k1.h
#define SPBYPASS_ENABLE         0x00000001        /* Enable SPDIF bypass
mode                        */
#define SPBYPASS_ENABLE         0x00000001        /* Enable SPDIF bypass
mode                        */
############################################################################
#####################################
# NOT PRESENT IN alsa-driver, but present in 8010.h from emu10k1 from
creative. #################
   #define AC97SLOT                0x5f                /* additional AC97
slots enable bits */
   #define AC97SLOT_CNTR           0x10                /* Center enable */
   #define AC97SLOT_LFE            0x20                /* LFE enable */
############################################################################
#######################
#define CDSRCS                  0x60                /* CD-ROM Sample Rate
Converter status register        */
#define CDSRCS                  0x60                /* CD-ROM Sample Rate
Converter status register        */
...
############################################################################
#####################################
Also needed

#define HCFG_GPOUT0     0x00001000   /* Set to enable digital out on 5.1 cards
*/

Also, documented in the emu10k1 driver from creative: -
/* 5.1: Enable the additional AC97 Slots. If the emu10k1 version
        does not support this, it shouldn't do any harm */
sblive_writeptr(card, AC97SLOT, 0, AC97SLOT_CNTR|AC97SLOT_LFE);








> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of James
> Courtier-Dutton
> Sent: 21 September 2001 11:13
> To: ALSA development
> Subject: [Alsa-devel] surround_51 on SB Live 5.1
>
>
> Hello
> Has anyone tried to get analogue audio out of all three jacks on this card
> with alsa 9 ?
> We can get 4, but when trying 6, is says something about
> ALSA lib setup.c:528:(add_elem) Cannot obtain info for CTL elem
> (MIXER,'Headphon
> e Center Playback Switch',0,0,0): No such file or directory
>
> Is there some command we have to do first to enable the 3rd audio jack.
> It is a shared jack for audio and SPDIF digital.
>
> I have looked in the source code, and can see that support should
> be there,
> but I cannot find out how to activate it.
>
> Cheers
> James
>
>
> --
> Nothing in this world is exactly what it appears to be.
>
>
> _______________________________________________
> Alsa-devel mailing list
> [EMAIL PROTECTED]
> https://lists.sourceforge.net/lists/listinfo/alsa-devel


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