Re: FM801 5.1 surround

[Takashi Iwai <tiwai@suse.de>]

At Mon, 19 Aug 2002 19:51:53 +0100,
Emilio Federici wrote:
> 
>  
> --
> 
> On Mon, 19 Aug 2002 17:54:38  
>  Takashi Iwai wrote:
> 
> >
> >which ac97 chip on the card?  no relevant mixer elements?
> >
> >i guess the fm801 engine itself already supports 6 channels but the
> >codec is not.
> >
> >
> >Takashi
> >
> 
> Hi Takashi, thanks for your immediate answer. I unplugged the card and found it has 2 ac97 chips:
> 
> SIGMATEL STAC9721T
> WM XWM9704
> 
> This is the 'amixer scontrols' output:
> [root@localhost root]# amixer scontrols
> Simple mixer control 'Master',0
> Simple mixer control 'Master Mono',0
> Simple mixer control 'Master',1
> Simple mixer control 'Master Mono',1
> Simple mixer control '3D Control - Center',0
> Simple mixer control '3D Control - Depth',0
> Simple mixer control '3D Control - Switch',0
> Simple mixer control '3D Control - Switch',1
> Simple mixer control '3D Control Sigmatel - Depth',1
> Simple mixer control 'PCM',0
> Simple mixer control 'PCM',1
> Simple mixer control 'Surround',0
> Simple mixer control 'FM',0
> Simple mixer control 'Wave',0
> Simple mixer control 'Line',0
> Simple mixer control 'Line',1
> Simple mixer control 'CD',0
> Simple mixer control 'CD',1
> Simple mixer control 'Mic',0
> Simple mixer control 'Mic Boost (+20dB)',0
> Simple mixer control 'Mic Boost (+20dB)',1
> Simple mixer control 'Mic',1
> Simple mixer control 'Video',0
> Simple mixer control 'Video',1
> Simple mixer control 'Phone',0
> Simple mixer control 'Phone',1
> Simple mixer control 'I2S',0
> Simple mixer control 'IEC958',0
> Simple mixer control 'IEC958 Raw Data',0
> Simple mixer control 'PC Speaker',0
> Simple mixer control 'PC Speaker',1
> Simple mixer control 'Aux',0
> Simple mixer control 'Aux',1
> Simple mixer control 'Capture',0
> Simple mixer control 'Capture',1
> Simple mixer control 'Mix',0
> Simple mixer control 'Mix Mono',0
> Simple mixer control 'Mix',1
> Simple mixer control 'Mix Mono',1
> Simple mixer control 'AC97 18-bit',0
> Simple mixer control 'AC97 2ch->4ch Copy',0
> Simple mixer control 'External Amplifier Power Down',0
> Simple mixer control 'External Amplifier Power Down',1

as you see above, there are double entries with different indices, so
apparently the fm801 driver already probed two codec properly.

i guess you didn't configure the secondary codec.
please try unmute and adjust the volume of secondary mixer elements,
i.e. 'Master,1' and 'PCM,1'.
most likely this corresponds to the center/lfe volume.


> I'm considering upgrading to a Sounblaster Audigy (for this among
> many other reasons) but I read that it has similar problems with 5.1
> output, is that still true? 

iirc, it works for analog outputs.
the digital output seems not working yet.
recently a patch was applied to support the spdif i/o on audigy drive,
but i myself cannot test it.


Takashi


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