any support for realtech sound chip

any support for realtech sound chip

[John Covici]

Hi.  I would like to use a Shuttle An50R which supports the Athlon 64
under Linux, but their sound chip is an ac97 audio Realtech.  What
module would support such a beast or is it not possible to use ALSA
with that chip?

Thanks.

-- 
         John Covici
         covici@ccs.covici.com


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Re: any support for realtech sound chip

[John W. Cocula]

The Realtek ALC650 rev 3 chip, in my Shuttle SB62G2, is supported by the
intel8x0 driver.

HOWEVER, and I have a headache from it at this very moment, I've just
learned that the driver does not support anything but the front L and R
channels for output.

Can anyone tell me what is involved in evolving the driver so that it will
support all 6 playback channels?  Please someone tell me what I can do to
help make this come to pass!

Many thanks,
John

Now to find some ibuprofen.


John Covici said:
> Hi.  I would like to use a Shuttle An50R which supports the Athlon 64
> under Linux, but their sound chip is an ac97 audio Realtech.  What
> module would support such a beast or is it not possible to use ALSA
> with that chip?
>
> Thanks.
>
> --
>          John Covici
>          covici@ccs.covici.com
>
>
> -------------------------------------------------------
> The SF.Net email is sponsored by EclipseCon 2004
> Premiere Conference on Open Tools Development and Integration
> See the breadth of Eclipse activity. February 3-5 in Anaheim, CA.
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> Alsa-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/alsa-devel
>



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Re: any support for realtech sound chip

[James Courtier-Dutton]

5.1 Audio works fine on my ALC650 rev 3 chip.
I have a Intel ICH5 chip controlling it.
Try my speaker-test program from 
http://www.superbug.demon.co.uk/speaker-test/

Cheers
James


John W. Cocula wrote:
> The Realtek ALC650 rev 3 chip, in my Shuttle SB62G2, is supported by the
> intel8x0 driver.
> 
> HOWEVER, and I have a headache from it at this very moment, I've just
> learned that the driver does not support anything but the front L and R
> channels for output.
> 
> Can anyone tell me what is involved in evolving the driver so that it will
> support all 6 playback channels?  Please someone tell me what I can do to
> help make this come to pass!
> 
> Many thanks,
> John
> 
> Now to find some ibuprofen.
> 
> 
> John Covici said:
> 
>>Hi.  I would like to use a Shuttle An50R which supports the Athlon 64
>>under Linux, but their sound chip is an ac97 audio Realtech.  What
>>module would support such a beast or is it not possible to use ALSA
>>with that chip?
>>
>>Thanks.
>>
>>--
>>         John Covici
>>         covici@ccs.covici.com
>>




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Re: any support for realtech sound chip

[John W. Cocula]

Hi James,

It was your program that further confirmed that it does not work for me!

$ ./speaker-test -Drear -c 2

speaker-test 0.0.3

Playback device is rear
Stream parameters are 48000Hz, S16_LE, 2 channels
Sine wave rate is 440.0000Hz
ALSA lib pcm.c:1812:(snd_pcm_open_conf) Invalid type for PCM rear
definition (id: rear, value: cards.pcm.rear)
Playback open error: Invalid argument


I'm using ALSA 1.0.1.  What is different???

Thanks,
John

James Courtier-Dutton said:
> 5.1 Audio works fine on my ALC650 rev 3 chip.
> I have a Intel ICH5 chip controlling it.
> Try my speaker-test program from
> http://www.superbug.demon.co.uk/speaker-test/
>
> Cheers
> James
>
>
> John W. Cocula wrote:
>> The Realtek ALC650 rev 3 chip, in my Shuttle SB62G2, is supported by the
>> intel8x0 driver.
>>
>> HOWEVER, and I have a headache from it at this very moment, I've just
>> learned that the driver does not support anything but the front L and R
>> channels for output.
>>
>> Can anyone tell me what is involved in evolving the driver so that it
>> will
>> support all 6 playback channels?  Please someone tell me what I can do
>> to
>> help make this come to pass!
>>
>> Many thanks,
>> John
>>
>> Now to find some ibuprofen.
>>
>>
>> John Covici said:
>>
>>>Hi.  I would like to use a Shuttle An50R which supports the Athlon 64
>>>under Linux, but their sound chip is an ac97 audio Realtech.  What
>>>module would support such a beast or is it not possible to use ALSA
>>>with that chip?
>>>
>>>Thanks.
>>>
>>>--
>>>         John Covici
>>>         covici@ccs.covici.com
>>>
>
>



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Re: any support for realtech sound chip

[Torrey Hoffman]

I've got an ABit MAX-3 with the ALC650 chip controlled by the Intel ICH5
(R) as well.  Playback through the front channel with ALSA works fine.

My problem is that the motherboard has 5 1/8th inch mini jacks on the
back, and two of those can be configured as either input or output. 
One may be either Microphone 1 stereo input, or output the center
channel and subwoofer channel.  Another may be either a stereo line
input, or output the rear surround channels.

The gnome ALSA Mixer program shows options to set these (they appear as
check boxes labelled "Line-In As Surround" and "Mic As Center/LFE") but
selecting them doesn't seem to give me any extra output channels.

With both of those checkboxes turned on, my /proc/asound/devices still
shows:

[thoffman@moria thoffman]$ cat /proc/asound/devices
  0: [0- 0]: ctl
 20: [0- 4]: digital audio playback
 27: [0- 3]: digital audio capture
 26: [0- 2]: digital audio capture
 25: [0- 1]: digital audio capture
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
 33:       : timer

(Device 0-4 is the optical SPDIF output.  I don't know if it works or
not, I have nothing that can take optical inputs.)

If anyone out there knows how to make my six-channel sound outputs
actually work, I'd be deeply appreciative.

Thanks!


On Thu, 2004-01-22 at 12:20, James Courtier-Dutton wrote:
> 5.1 Audio works fine on my ALC650 rev 3 chip.
> I have a Intel ICH5 chip controlling it.
> Try my speaker-test program from 
> http://www.superbug.demon.co.uk/speaker-test/
> 
> Cheers
> James
> 
> 
> John W. Cocula wrote:
> > The Realtek ALC650 rev 3 chip, in my Shuttle SB62G2, is supported by the
> > intel8x0 driver.
> > 
> > HOWEVER, and I have a headache from it at this very moment, I've just
> > learned that the driver does not support anything but the front L and R
> > channels for output.
> > 
> > Can anyone tell me what is involved in evolving the driver so that it will
> > support all 6 playback channels?  Please someone tell me what I can do to
> > help make this come to pass!
> > 
> > Many thanks,
> > John
> > 
> > Now to find some ibuprofen.
> > 
> > 
> > John Covici said:
> > 
> >>Hi.  I would like to use a Shuttle An50R which supports the Athlon 64
> >>under Linux, but their sound chip is an ac97 audio Realtech.  What
> >>module would support such a beast or is it not possible to use ALSA
> >>with that chip?
> >>
> >>Thanks.
> >>
> >>--
> >>         John Covici
> >>         covici@ccs.covici.com
> >>
> 
> 
> 
> 
> -------------------------------------------------------
> The SF.Net email is sponsored by EclipseCon 2004
> Premiere Conference on Open Tools Development and Integration
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> _______________________________________________
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> https://lists.sourceforge.net/lists/listinfo/alsa-devel
-- 
Torrey Hoffman <thoffman@arnor.net>



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Re: any support for realtech sound chip

[Clemens Ladisch]

John W. Cocula wrote:
> $ ./speaker-test -Drear -c 2
>
> ALSA lib pcm.c:1812:(snd_pcm_open_conf) Invalid type for PCM rear definition (id: rear, value: cards.pcm.rear)
> Playback open error: Invalid argument

You cannot access the rear channels seperately (at least not
directly). The ICH only supports 2-channel (front), 4-channel
(front+surround) and 6-channel (front+surr+center+lfe) output.


HTH
Clemens




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Multichannel AC97 support - was "Re: any support for realtech sound chip"

[Torrey Hoffman]

On Fri, 2004-01-23 at 01:52, Clemens Ladisch wrote:
> John W. Cocula wrote:
> > $ ./speaker-test -Drear -c 2
> >
> > ALSA lib pcm.c:1812:(snd_pcm_open_conf) Invalid type for PCM rear definition (id: rear, value: cards.pcm.rear)
> > Playback open error: Invalid argument
> 
> You cannot access the rear channels seperately (at least not
> directly). The ICH only supports 2-channel (front), 4-channel
> (front+surround) and 6-channel (front+surr+center+lfe) output.

This is interesting... If I understand you correctly, you mean that the
digital PCM data for the 4 channels or 6 channels must all be
interleaved together and sent through a single device, just like the
left and right channels of a stereo channel?

If this is correct, would it be possible to set up a plug-in layer which
opens the ICH hardware in 6-channel mode, but then provides three
virtual stereo devices to applications?  

The plugin would just interleave, or multiplex the digital pcm data
together, and insert silent "0" samples on any channel which wasn't
opened by an application.

Diagram:  (each letter represents a 16-bit PCM sample)

pcm stereo 1: ababab... -->  |========|                      |hardware|
pcm stereo 2: cdcdcd... -->  | plugin |-->abcdefabcdef... -->|in 6 ch |
pcm stereo 3: efefef... -->  |========|                      | mode   |

My goal is to get my ICH-->realtech working in 6 channel output mode in
a way that I can run three instances of Rhythmbox, streaming three
totally independent stereo streams to three stereo amplifiers hooked to
speakers in three different rooms :-)

Hopefully this is not impossible?  

I'm willing to do some programming to make it happen, if the hardware
can support it...

Torrey

> 
> 
> HTH
> Clemens
> 
> 
> 
> 
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> https://lists.sourceforge.net/lists/listinfo/alsa-devel
-- 
Torrey Hoffman <thoffman@arnor.net>



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Re: Multichannel AC97 support - was "Re: any support for realtech sound chip"

[Jaroslav Kysela]

On Fri, 23 Jan 2004, Torrey Hoffman wrote:

> On Fri, 2004-01-23 at 01:52, Clemens Ladisch wrote:
> > John W. Cocula wrote:
> > > $ ./speaker-test -Drear -c 2
> > >
> > > ALSA lib pcm.c:1812:(snd_pcm_open_conf) Invalid type for PCM rear definition (id: rear, value: cards.pcm.rear)
> > > Playback open error: Invalid argument
> > 
> > You cannot access the rear channels seperately (at least not
> > directly). The ICH only supports 2-channel (front), 4-channel
> > (front+surround) and 6-channel (front+surr+center+lfe) output.
> 
> This is interesting... If I understand you correctly, you mean that the
> digital PCM data for the 4 channels or 6 channels must all be
> interleaved together and sent through a single device, just like the
> left and right channels of a stereo channel?
> 
> If this is correct, would it be possible to set up a plug-in layer which
> opens the ICH hardware in 6-channel mode, but then provides three
> virtual stereo devices to applications?  
> 
> The plugin would just interleave, or multiplex the digital pcm data
> together, and insert silent "0" samples on any channel which wasn't
> opened by an application.
> 
> Diagram:  (each letter represents a 16-bit PCM sample)
> 
> pcm stereo 1: ababab... -->  |========|                      |hardware|
> pcm stereo 2: cdcdcd... -->  | plugin |-->abcdefabcdef... -->|in 6 ch |
> pcm stereo 3: efefef... -->  |========|                      | mode   |
> 
> My goal is to get my ICH-->realtech working in 6 channel output mode in
> a way that I can run three instances of Rhythmbox, streaming three
> totally independent stereo streams to three stereo amplifiers hooked to
> speakers in three different rooms :-)
> 
> Hopefully this is not impossible?  

No, use the dshare plugin with different channel bindings.

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs


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