ASUS M2N32 MCP55 HDAudio problems

ASUS M2N32 MCP55 HDAudio problems

[Daniel Schroeder]

Hello *,

sorry for posting this to devel and users, but i think this could be
interesting for both. Plz. send replies in cc to my mail address because
 i am not on list.

I am a proud owner of this flagship mainboard with a nvdidia mcp55
hdaudio sound card. The chip is identified by alsa as a AD1988A rev.2
(dmesg, lspci -v, lspci -nv output below):

The problem is that if i activate only front in kmix all is fine.
Speaker-Test works as expected. If i activate lfe/center then the sound
is messed up and he plays front-left/front-rigt through center and lfe.

I have played around with differend model settings: 6jack etc. no model
worked.

PLZ: help or if i can help you with my hardware i will do so...i have a
little linux experience and could compile alsa drivers in debugging mode
to play around with this things and hopefully find the right
configuration for this mainboard.

thanks in advance

cheers,

daniel


Hardware: 6 Jacks, spdif and two jacks in front (hp, mic)

Kernel: Gentoo-2.6.17

ALSA
/var/tmp/portage/alsa-driver-1.0.12_rc1/work/alsa-driver-1.0.12rc1/pci/hda/../../alsa-kernel/pci/hda/patch_analog.c:2566:
patch_analog: AD1988A rev.2 is detected, enable workarounds

lspci -v output:

00:0e.1 Audio device: nVidia Corporation MCP55 High Definition Audio
(rev a2)
        Subsystem: ASUSTeK Computer Inc. Unknown device 81f6
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
        Memory at fe020000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [44] Power Management version 2
        Capabilities: [50] Message Signalled Interrupts: 64bit+
Queue=0/0 Enable-
        Capabilities: [6c] HyperTransport: MSI Mapping

lspci -nv output:

00:0e.1 0403: 10de:0371 (rev a2)
        Subsystem: 1043:81f6
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
        Memory at fe020000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [44] Power Management version 2
        Capabilities: [50] Message Signalled Interrupts: 64bit+
Queue=0/0 Enable-
        Capabilities: [6c] HyperTransport: MSI Mapping



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Re: ASUS M2N32 MCP55 HDAudio problems

[Takashi Iwai]

At Tue, 27 Jun 2006 22:43:49 +0200,
Daniel Schroeder wrote:
> 
> Hello *,
> 
> sorry for posting this to devel and users, but i think this could be
> interesting for both. Plz. send replies in cc to my mail address because
>  i am not on list.
> 
> I am a proud owner of this flagship mainboard with a nvdidia mcp55
> hdaudio sound card. The chip is identified by alsa as a AD1988A rev.2
> (dmesg, lspci -v, lspci -nv output below):
> 
> The problem is that if i activate only front in kmix all is fine.
> Speaker-Test works as expected. If i activate lfe/center then the sound
> is messed up and he plays front-left/front-rigt through center and lfe.

What do you mean to "activate lfe/center"?
A more detailed step to reproduce is helpful.


Takashi

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Re: ASUS M2N32 MCP55 HDAudio problems

[Daniel Schroeder]

Takashi Iwai wrote:
> At Tue, 27 Jun 2006 22:43:49 +0200,
> Daniel Schroeder wrote:
>> Hello *,
>>
>> sorry for posting this to devel and users, but i think this could be
>> interesting for both. Plz. send replies in cc to my mail address because
>>  i am not on list.
>>
>> I am a proud owner of this flagship mainboard with a nvdidia mcp55
>> hdaudio sound card. The chip is identified by alsa as a AD1988A rev.2
>> (dmesg, lspci -v, lspci -nv output below):
>>
>> The problem is that if i activate only front in kmix all is fine.
>> Speaker-Test works as expected. If i activate lfe/center then the sound
>> is messed up and he plays front-left/front-rigt through center and lfe.
> 
> What do you mean to "activate lfe/center"?
> A more detailed step to reproduce is helpful.
> 
> 
> Takashi

a more detail problem description:

with this module configuration: options snd-hda-intel model=6stack-dig
position_fix=1
--------------------------
headphone jack in front: if connected the regular sound isnt muted.
--------------------------
speaker test hangs in surround51 configuration:

speaker-test -Dplug:surround51 -c6

speaker-test 1.0.12rc1

Playback device is plug:surround51
Stream parameters are 48000Hz, S16_LE, 6 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 22 to 5461
Period size range from 11 to 2730
Using max buffer size 5460
Periods = 4
was set period_size = 1365
was set buffer_size = 5460
 0 - Front Left
---- hangs forever
----------------------------
speaker-test in surround40

front left=sound output rear left;
front right=sound output rear right;
rear right=sound output subwoofer
rear left=sound output center

in kmix front,surround,center,lfe,side is unmuted and 85%

speaker-test -Dplug:surround40 -c4

speaker-test 1.0.12rc1

Playback device is plug:surround40
Stream parameters are 48000Hz, S16_LE, 4 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 32 to 8192
Period size range from 16 to 4096
Using max buffer size 8192
Periods = 4
was set period_size = 2048
was set buffer_size = 8192
 0 - Front Left
 1 - Front Right
 3 - Rear Right
 2 - Rear Left
-----------------------------

i would expect other fields in kmix additional to the fields/sliders
mentioned above a slider for rear is missing.

And i would expect that the speaker test would work.

-----------------------------

aplay plays front left through center and front right throug rear right

aplay -dsurround51 chan-id.wav

-----------------------------

in other applications there is something wrong, but i cannot determine
the problem as in the examples above.

I hope this helps a bit more..


daniel

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Re: ASUS M2N32 MCP55 HDAudio problems

[Takashi Iwai]

At Wed, 28 Jun 2006 23:20:12 +0200,
Daniel Schroeder wrote:
> 
> Takashi Iwai wrote:
> > At Tue, 27 Jun 2006 22:43:49 +0200,
> > Daniel Schroeder wrote:
> >> Hello *,
> >>
> >> sorry for posting this to devel and users, but i think this could be
> >> interesting for both. Plz. send replies in cc to my mail address because
> >>  i am not on list.
> >>
> >> I am a proud owner of this flagship mainboard with a nvdidia mcp55
> >> hdaudio sound card. The chip is identified by alsa as a AD1988A rev.2
> >> (dmesg, lspci -v, lspci -nv output below):
> >>
> >> The problem is that if i activate only front in kmix all is fine.
> >> Speaker-Test works as expected. If i activate lfe/center then the sound
> >> is messed up and he plays front-left/front-rigt through center and lfe.
> > 
> > What do you mean to "activate lfe/center"?
> > A more detailed step to reproduce is helpful.
> > 
> > 
> > Takashi
> 
> a more detail problem description:
> 
> with this module configuration: options snd-hda-intel model=6stack-dig
> position_fix=1

Doesn't the driver work without position_fix option?

> --------------------------
> headphone jack in front: if connected the regular sound isnt muted.
> --------------------------
> speaker test hangs in surround51 configuration:
> 
> speaker-test -Dplug:surround51 -c6
> 
> speaker-test 1.0.12rc1
> 
> Playback device is plug:surround51
> Stream parameters are 48000Hz, S16_LE, 6 channels
> Using 16 octaves of pink noise
> Rate set to 48000Hz (requested 48000Hz)
> Buffer size range from 22 to 5461
> Period size range from 11 to 2730
> Using max buffer size 5460
> Periods = 4
> was set period_size = 1365
> was set buffer_size = 5460
>  0 - Front Left
> ---- hangs forever

That's bad.  Does aplay with 6 channel samples work fine?

> ----------------------------
> speaker-test in surround40
> 
> front left=sound output rear left;
> front right=sound output rear right;
> rear right=sound output subwoofer
> rear left=sound output center

So the channels are shifted.

When you play with 2-channel via "aplay foo.wav", do the samples come
from front speakers?

As you might have noticed in the kernel message, there is a workaround
for AD1988A rev2 codec.  You can disable it by re-defining
AD1988A_REV2 in patch_analog.c to a bogus value, for example, a patch
like below.  Then try the tests again.


Takashi

diff -r ac7516b5dcb9 pci/hda/patch_analog.c
--- a/pci/hda/patch_analog.c	Thu Jun 29 13:22:29 2006 +0200
+++ b/pci/hda/patch_analog.c	Thu Jun 29 14:58:36 2006 +0200
@@ -1543,7 +1543,8 @@ enum {
 };
 
 /* reivision id to check workarounds */
-#define AD1988A_REV2		0x100200
+// #define AD1988A_REV2		0x100200
+#define AD1988A_REV2		0xabcd1234 /* bogus */
 
 
 /*

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Re: ASUS M2N32 MCP55 HDAudio problems

[Daniel Schroeder]

Takashi Iwai wrote:
> At Wed, 28 Jun 2006 23:20:12 +0200,
> Daniel Schroeder wrote:
>> Takashi Iwai wrote:
>>> At Tue, 27 Jun 2006 22:43:49 +0200,
>>> Daniel Schroeder wrote:
>>>> Hello *,
>>>>
>>>> sorry for posting this to devel and users, but i think this could be
>>>> interesting for both. Plz. send replies in cc to my mail address because
>>>>  i am not on list.
>>>>
>>>> I am a proud owner of this flagship mainboard with a nvdidia mcp55
>>>> hdaudio sound card. The chip is identified by alsa as a AD1988A rev.2
>>>> (dmesg, lspci -v, lspci -nv output below):
>>>>
>>>> The problem is that if i activate only front in kmix all is fine.
>>>> Speaker-Test works as expected. If i activate lfe/center then the sound
>>>> is messed up and he plays front-left/front-rigt through center and lfe.
>>> What do you mean to "activate lfe/center"?
>>> A more detailed step to reproduce is helpful.
>>>
>>>
>>> Takashi
>> a more detail problem description:
>>
>> with this module configuration: options snd-hda-intel model=6stack-dig
>> position_fix=1
> 
> Doesn't the driver work without position_fix option?

The driver works without these options...i have just played around with
these.

> 
>> --------------------------
>> headphone jack in front: if connected the regular sound isnt muted.
>> --------------------------
>> speaker test hangs in surround51 configuration:
>>
>> speaker-test -Dplug:surround51 -c6
>>
>> speaker-test 1.0.12rc1
>>
>> Playback device is plug:surround51
>> Stream parameters are 48000Hz, S16_LE, 6 channels
>> Using 16 octaves of pink noise
>> Rate set to 48000Hz (requested 48000Hz)
>> Buffer size range from 22 to 5461
>> Period size range from 11 to 2730
>> Using max buffer size 5460
>> Periods = 4
>> was set period_size = 1365
>> was set buffer_size = 5460
>>  0 - Front Left
>> ---- hangs forever
> 
> That's bad.  Does aplay with 6 channel samples work fine?

while true;  do aplay chan-id.wav ; done
Playing WAVE 'chan-id.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Channels 6


aplay with 6 channel sample works but only front left / front right the
other "tracks" in the file are "silent".
Output of front left and front right are: front left all speakers to the
left. front left/rear left/center with output of channel "front right"
all speakers to the right "front right/rear right/subwoofer"

> 
>> ----------------------------
>> speaker-test in surround40
>>
>> front left=sound output rear left;
>> front right=sound output rear right;
>> rear right=sound output subwoofer
>> rear left=sound output center
> 
> So the channels are shifted.
> 
> When you play with 2-channel via "aplay foo.wav", do the samples come
> from front speakers?

aplay 10.wav
Playing WAVE 10.wav : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

sound comes through all speakers, front left/front right/rear left/rear
right/center and subwoofer

> 
> As you might have noticed in the kernel message, there is a workaround
> for AD1988A rev2 codec.  You can disable it by re-defining
> AD1988A_REV2 in patch_analog.c to a bogus value, for example, a patch
> like below.  Then try the tests again.
> 
> 
> Takashi
> 
> diff -r ac7516b5dcb9 pci/hda/patch_analog.c
> --- a/pci/hda/patch_analog.c	Thu Jun 29 13:22:29 2006 +0200
> +++ b/pci/hda/patch_analog.c	Thu Jun 29 14:58:36 2006 +0200
> @@ -1543,7 +1543,8 @@ enum {
>  };
>  
>  /* reivision id to check workarounds */
> -#define AD1988A_REV2		0x100200
> +// #define AD1988A_REV2		0x100200
> +#define AD1988A_REV2		0xabcd1234 /* bogus */
>  
>  
>  /*
i have patched the file patch_analog.c recompiled and loaded the module.
same bad behaviour. Im sure that he has taken the new module because the
dmesg output is missing.

----

have you any clues of what i could do? This stuff is a bit mysterious
for me. Why does he play a stereo wav file to all speakers. And why does
he plays only two channels of the surround file (chan-id.wav) and these
two channels getting splitted to every left speaker / every right speaker...

,
daniel


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Re: ASUS M2N32 MCP55 HDAudio problems - small solution!

[Daniel Schroeder]

Takashi Iwai wrote:
> At Wed, 28 Jun 2006 23:20:12 +0200,
> Daniel Schroeder wrote:
>> Takashi Iwai wrote:
>>> At Tue, 27 Jun 2006 22:43:49 +0200,
>>> Daniel Schroeder wrote:
>>>> Hello *,
>>>>
>>>> sorry for posting this to devel and users, but i think this could be
>>>> interesting for both. Plz. send replies in cc to my mail address because
>>>>  i am not on list.
>>>>
>>>> I am a proud owner of this flagship mainboard with a nvdidia mcp55
>>>> hdaudio sound card. The chip is identified by alsa as a AD1988A rev.2
>>>> (dmesg, lspci -v, lspci -nv output below):
>>>>
>>>> The problem is that if i activate only front in kmix all is fine.
>>>> Speaker-Test works as expected. If i activate lfe/center then the sound
>>>> is messed up and he plays front-left/front-rigt through center and lfe.
>>> What do you mean to "activate lfe/center"?
>>> A more detailed step to reproduce is helpful.
>>>
>>>
>>> Takashi
>> a more detail problem description:
>>
>> with this module configuration: options snd-hda-intel model=6stack-dig
>> position_fix=1
> 
> Doesn't the driver work without position_fix option?

The driver works without these options...i have just played around with
these.

> 
>> --------------------------
>> headphone jack in front: if connected the regular sound isnt muted.
>> --------------------------
>> speaker test hangs in surround51 configuration:
>>
>> speaker-test -Dplug:surround51 -c6
>>
>> speaker-test 1.0.12rc1
>>
>> Playback device is plug:surround51
>> Stream parameters are 48000Hz, S16_LE, 6 channels
>> Using 16 octaves of pink noise
>> Rate set to 48000Hz (requested 48000Hz)
>> Buffer size range from 22 to 5461
>> Period size range from 11 to 2730
>> Using max buffer size 5460
>> Periods = 4
>> was set period_size = 1365
>> was set buffer_size = 5460
>>  0 - Front Left
>> ---- hangs forever
> 
> That's bad.  Does aplay with 6 channel samples work fine?

while true;  do aplay chan-id.wav ; done
Playing WAVE 'chan-id.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Channels 6


aplay with 6 channel sample works but only front left / front right the
other "tracks" in the file are "silent".
Output of front left and front right are: front left all speakers to the
left. front left/rear left/center with output of channel "front right"
all speakers to the right "front right/rear right/subwoofer"

> 
>> ----------------------------
>> speaker-test in surround40
>>
>> front left=sound output rear left;
>> front right=sound output rear right;
>> rear right=sound output subwoofer
>> rear left=sound output center
> 
> So the channels are shifted.
> 
> When you play with 2-channel via "aplay foo.wav", do the samples come
> from front speakers?

aplay 10.wav
Playing WAVE 10.wav : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

sound comes through all speakers, front left/front right/rear left/rear
right/center and subwoofer

> 
> As you might have noticed in the kernel message, there is a workaround
> for AD1988A rev2 codec.  You can disable it by re-defining
> AD1988A_REV2 in patch_analog.c to a bogus value, for example, a patch
> like below.  Then try the tests again.
> 
> 
> Takashi
> 
> diff -r ac7516b5dcb9 pci/hda/patch_analog.c
> --- a/pci/hda/patch_analog.c	Thu Jun 29 13:22:29 2006 +0200
> +++ b/pci/hda/patch_analog.c	Thu Jun 29 14:58:36 2006 +0200
> @@ -1543,7 +1543,8 @@ enum {
>  };
>  
>  /* reivision id to check workarounds */
> -#define AD1988A_REV2		0x100200
> +// #define AD1988A_REV2		0x100200
> +#define AD1988A_REV2		0xabcd1234 /* bogus */
>  
>  
>  /*
i have patched the file patch_analog.c recompiled and loaded the module.
same bad behaviour. Im sure that he has taken the new module because the
dmesg output is missing.

----

have you any clues of what i could do? This stuff is a bit mysterious
for me. Why does he play a stereo wav file to all speakers. And why does
he plays only two channels of the surround file (chan-id.wav) and these
two channels getting splitted to every left speaker / every right speaker...

,
daniel

P.S.: after writing my last email...i have tested the movie file with
mplayer.

Ãffne Audiodecoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 5.1 (3f+2r+lfe)  48000 Hz  448.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 6 ch, s16le, 448.0 kbit/9.72% (ratio: 56000->576000)
Ausgewählter Audiocodec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
==========================================================================
Ãffne Videodecoder: [ffmpeg] FFmpeg's libavcodec codec family
Ausgewählter Videocodec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
alsa-init: using device surround51
alsa: 48000 Hz/6 channels/12 bpf/61440 bytes buffer/Signed 16 bit Little
Endian
AO: [alsa] 48000Hz 6ch s16le (2 bytes per sample)


now the missing audio channel is there and it seems to me that this
movie is fully working in surround!
This bogus patch seems to work :)


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Re: ASUS M2N32 MCP55 HDAudio problems - small solution!

[Takashi Iwai]

At Thu, 29 Jun 2006 20:41:03 +0200,
Daniel Schroeder wrote:
> 
> > 
> >> --------------------------
> >> headphone jack in front: if connected the regular sound isnt muted.
> >> --------------------------
> >> speaker test hangs in surround51 configuration:
> >>
> >> speaker-test -Dplug:surround51 -c6
> >>
> >> speaker-test 1.0.12rc1
> >>
> >> Playback device is plug:surround51
> >> Stream parameters are 48000Hz, S16_LE, 6 channels
> >> Using 16 octaves of pink noise
> >> Rate set to 48000Hz (requested 48000Hz)
> >> Buffer size range from 22 to 5461
> >> Period size range from 11 to 2730
> >> Using max buffer size 5460
> >> Periods = 4
> >> was set period_size = 1365
> >> was set buffer_size = 5460
> >>  0 - Front Left
> >> ---- hangs forever
> > 
> > That's bad.  Does aplay with 6 channel samples work fine?
> 
> while true;  do aplay chan-id.wav ; done
> Playing WAVE 'chan-id.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
> Channels 6
> 
> 
> aplay with 6 channel sample works but only front left / front right the
> other "tracks" in the file are "silent".
> Output of front left and front right are: front left all speakers to the
> left. front left/rear left/center with output of channel "front right"
> all speakers to the right "front right/rear right/subwoofer"

So, it doesn't hang up, right?  Then maybe the buffer/period setting
influences on behavior of speaker-test...


> >> ----------------------------
> >> speaker-test in surround40
> >>
> >> front left=sound output rear left;
> >> front right=sound output rear right;
> >> rear right=sound output subwoofer
> >> rear left=sound output center
> > 
> > So the channels are shifted.
> > 
> > When you play with 2-channel via "aplay foo.wav", do the samples come
> > from front speakers?
> 
> aplay 10.wav
> Playing WAVE 10.wav : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
> 
> sound comes through all speakers, front left/front right/rear left/rear
> right/center and subwoofer

OK, that's default behavior of the driver.  All left/right are spread
to rear and CLFE.


> > As you might have noticed in the kernel message, there is a workaround
> > for AD1988A rev2 codec.  You can disable it by re-defining
> > AD1988A_REV2 in patch_analog.c to a bogus value, for example, a patch
> > like below.  Then try the tests again.
> > 
> > 
> > Takashi
> > 
> > diff -r ac7516b5dcb9 pci/hda/patch_analog.c
> > --- a/pci/hda/patch_analog.c	Thu Jun 29 13:22:29 2006 +0200
> > +++ b/pci/hda/patch_analog.c	Thu Jun 29 14:58:36 2006 +0200
> > @@ -1543,7 +1543,8 @@ enum {
> >  };
> >  
> >  /* reivision id to check workarounds */
> > -#define AD1988A_REV2		0x100200
> > +// #define AD1988A_REV2		0x100200
> > +#define AD1988A_REV2		0xabcd1234 /* bogus */
> >  
> >  
> >  /*
> i have patched the file patch_analog.c recompiled and loaded the module.
> same bad behaviour. Im sure that he has taken the new module because the
> dmesg output is missing.
> 
> ----
> 
> have you any clues of what i could do? This stuff is a bit mysterious
> for me. Why does he play a stereo wav file to all speakers. And why does
> he plays only two channels of the surround file (chan-id.wav) and these
> two channels getting splitted to every left speaker / every right speaker...
(snip)
> now the missing audio channel is there and it seems to me that this
> movie is fully working in surround!
> This bogus patch seems to work :)

It disables the workaround for AD1988A rev2.  According to AD, this
codec revision has a h/w bug, so I implemented the workaround as they
suggested.

Could you attach the content of /proc/asound/card0/codec#* files?
Is it really AD1988A, not AD1988B?


Takashi

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Re: ASUS M2N32 MCP55 HDAudio problems - small solution!

[Daniel Schroeder]

Takashi Iwai wrote:
> At Thu, 29 Jun 2006 20:41:03 +0200,
> Daniel Schroeder wrote:
>>>> --------------------------
>>>> headphone jack in front: if connected the regular sound isnt muted.
>>>> --------------------------
>>>> speaker test hangs in surround51 configuration:
>>>>
>>>> speaker-test -Dplug:surround51 -c6
>>>>
>>>> speaker-test 1.0.12rc1
>>>>
>>>> Playback device is plug:surround51
>>>> Stream parameters are 48000Hz, S16_LE, 6 channels
>>>> Using 16 octaves of pink noise
>>>> Rate set to 48000Hz (requested 48000Hz)
>>>> Buffer size range from 22 to 5461
>>>> Period size range from 11 to 2730
>>>> Using max buffer size 5460
>>>> Periods = 4
>>>> was set period_size = 1365
>>>> was set buffer_size = 5460
>>>>  0 - Front Left
>>>> ---- hangs forever
>>> That's bad.  Does aplay with 6 channel samples work fine?
>> while true;  do aplay chan-id.wav ; done
>> Playing WAVE 'chan-id.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
>> Channels 6
>>
>>
>> aplay with 6 channel sample works but only front left / front right the
>> other "tracks" in the file are "silent".
>> Output of front left and front right are: front left all speakers to the
>> left. front left/rear left/center with output of channel "front right"
>> all speakers to the right "front right/rear right/subwoofer"
> 
> So, it doesn't hang up, right?  Then maybe the buffer/period setting
> influences on behavior of speaker-test...
> 
> 
>>>> ----------------------------
>>>> speaker-test in surround40
>>>>
>>>> front left=sound output rear left;
>>>> front right=sound output rear right;
>>>> rear right=sound output subwoofer
>>>> rear left=sound output center
>>> So the channels are shifted.
>>>
>>> When you play with 2-channel via "aplay foo.wav", do the samples come
>>> from front speakers?
>> aplay 10.wav
>> Playing WAVE 10.wav : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
>>
>> sound comes through all speakers, front left/front right/rear left/rear
>> right/center and subwoofer
> 
> OK, that's default behavior of the driver.  All left/right are spread
> to rear and CLFE.
> 
> 
>>> As you might have noticed in the kernel message, there is a workaround
>>> for AD1988A rev2 codec.  You can disable it by re-defining
>>> AD1988A_REV2 in patch_analog.c to a bogus value, for example, a patch
>>> like below.  Then try the tests again.
>>>
>>>
>>> Takashi
>>>
>>> diff -r ac7516b5dcb9 pci/hda/patch_analog.c
>>> --- a/pci/hda/patch_analog.c	Thu Jun 29 13:22:29 2006 +0200
>>> +++ b/pci/hda/patch_analog.c	Thu Jun 29 14:58:36 2006 +0200
>>> @@ -1543,7 +1543,8 @@ enum {
>>>  };
>>>  
>>>  /* reivision id to check workarounds */
>>> -#define AD1988A_REV2		0x100200
>>> +// #define AD1988A_REV2		0x100200
>>> +#define AD1988A_REV2		0xabcd1234 /* bogus */
>>>  
>>>  
>>>  /*
>> i have patched the file patch_analog.c recompiled and loaded the module.
>> same bad behaviour. Im sure that he has taken the new module because the
>> dmesg output is missing.
>>
>> ----
>>
>> have you any clues of what i could do? This stuff is a bit mysterious
>> for me. Why does he play a stereo wav file to all speakers. And why does
>> he plays only two channels of the surround file (chan-id.wav) and these
>> two channels getting splitted to every left speaker / every right speaker...
> (snip)
>> now the missing audio channel is there and it seems to me that this
>> movie is fully working in surround!
>> This bogus patch seems to work :)
> 
> It disables the workaround for AD1988A rev2.  According to AD, this
> codec revision has a h/w bug, so I implemented the workaround as they
> suggested.
> 
> Could you attach the content of /proc/asound/card0/codec#* files?
> Is it really AD1988A, not AD1988B?
> 
> 
> Takashi

It is a AD1988B

small summary:

 - out of the box 1.0.12_rc1 recognize my chip as a AD1988A rev.2 ->
seems to be wrong.

 - with the "bogus patch" mplayer is working.

 -  Speaker-Test and aplay are "buggy" or not working as i would expect...

 - hp jack does not mute the other speakers

 - normal amarok output is a kind of too center/lfe centric (the winamp
output under windows has a much better sound)

 - i miss a "rear" volume slider in kmix

cat /proc/asound/card0/codec#0
Codec: Analog Devices AD1988B
Address: 0
Vendor Id: 0x11d4198b
Subsystem Id: 0x104381f6
Revision Id: 0x100200
Default PCM: rates 0x7ff, bits 0x0e, types 0x1
Default Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Default Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
Node 0x02 [Audio Output] wcaps 0x30311: Stereo Digital
  PCM: rates 0x7e0, bits 0x0e, types 0x5
  Connection: 1
     0x1d
Node 0x03 [Audio Output] wcaps 0x405: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x27 0x27]
  Power: 0x0
Node 0x04 [Audio Output] wcaps 0x405: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x24 0x24]
  Power: 0x0
Node 0x05 [Audio Output] wcaps 0x405: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x10 0x0c]
  Power: 0x0
Node 0x06 [Audio Output] wcaps 0x405: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x10 0x10]
  Power: 0x0
Node 0x07 [Audio Input] wcaps 0x130391: Stereo Digital
  PCM: rates 0x7e0, bits 0x0e, types 0x5
  Connection: 1
     0x1c
Node 0x08 [Audio Input] wcaps 0x100501: Stereo
  Power: 0x0
  Connection: 1
     0x0c
Node 0x09 [Audio Input] wcaps 0x100501: Stereo
  Power: 0x0
  Connection: 1
     0x0d
Node 0x0a [Audio Output] wcaps 0x405: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=0
  Amp-Out vals:  [0x14 0x14]
  Power: 0x0
Node 0x0b [Audio Selector] wcaps 0x300301: Stereo Digital
  Connection: 3
     0x08* 0x09 0x0f
Node 0x0c [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x36, stepsize=0x05, mute=1
  Amp-Out vals:  [0xa7 0xa7]
  Connection: 10
     0x38 0x39* 0x3a 0x3b 0x3c 0x18 0x24 0x25 0x3d 0x20
Node 0x0d [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x36, stepsize=0x05, mute=1
  Amp-Out vals:  [0xa7 0xa7]
  Connection: 10
     0x38 0x39* 0x3a 0x3b 0x3c 0x18 0x24 0x25 0x3d 0x20
Node 0x0e [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x36, stepsize=0x05, mute=1
  Amp-Out vals:  [0xa7 0xa7]
  Connection: 10
     0x38 0x39* 0x3a 0x3b 0x3c 0x18 0x24 0x25 0x3d 0x20
Node 0x0f [Audio Input] wcaps 0x100501: Stereo
  Power: 0x0
  Connection: 1
     0x0e
Node 0x10 [Beep Generator Widget] wcaps 0x70000c: Mono Amp-Out
  Amp-Out caps: ofs=0x0f, nsteps=0x0f, stepsize=0x0b, mute=1
  Amp-Out vals:  [0x00]
Node 0x11 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x08373f: IN OUT HP Detect
  Pin Default 0x02214130: [Jack] HP Out at Ext Front
    Conn = 1/8, Color = Green
  Pin-ctls: 0xc0: OUT HP
  Connection: 1
     0x22
Node 0x12 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x081373f: IN OUT HP EAPD Detect
  Pin Default 0x01014010: [Jack] Line Out at Ext Rear
    Conn = 1/8, Color = Green
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x29
Node 0x13 [Pin Complex] wcaps 0x40010c: Mono Amp-Out
  Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-Out vals:  [0x00]
  Pincap 0x0810: OUT
  Pin Default 0x511711f0: [N/A] Speaker at Int Rear
    Conn = Analog, Color = Black
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x2d
Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x08373f: IN OUT HP Detect
  Pin Default 0x02a19122: [Jack] Mic at Ext Front
    Conn = 1/8, Color = Pink
  Pin-ctls: 0x24: IN
  Connection: 1
     0x2b
Node 0x15 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x0813737: IN OUT EAPD Detect
  Pin Default 0x01813021: [Jack] Line In at Ext Rear
    Conn = 1/8, Color = Blue
  Pin-ctls: 0x20: IN
  Connection: 1
     0x2c
Node 0x16 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x083737: IN OUT Detect
  Pin Default 0x01011012: [Jack] Line Out at Ext Rear
    Conn = 1/8, Color = Black
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x2a
Node 0x17 [Pin Complex] wcaps 0x40098d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x083737: IN OUT Detect
  Pin Default 0x01a19020: [Jack] Mic at Ext Rear
    Conn = 1/8, Color = Pink
  Pin-ctls: 0x24: IN
  Connection: 1
     0x26
Node 0x18 [Pin Complex] wcaps 0x400001: Stereo
  Pincap 0x0820: IN
  Pin Default 0x9933112e: [Fixed] CD at Int ATAPI
    Conn = ATAPI, Color = Black
  Pin-ctls: 0x20: IN
Node 0x19 [Power Widget] wcaps 0x500500: Mono
  Power: 0x0
  Connection: 2
     0x20* 0x21
Node 0x1a [Pin Complex] wcaps 0x400000: Mono
  Pincap 0x0820: IN
  Pin Default 0x99f301f0: [Fixed] Other at Int ATAPI
    Conn = ATAPI, Color = Unknown
  Pin-ctls: 0x20: IN
Node 0x1b [Pin Complex] wcaps 0x40030d: Stereo Digital Amp-Out
  Amp-Out caps: ofs=0x27, nsteps=0x27, stepsize=0x05, mute=1
  Amp-Out vals:  [0x27 0x27]
  Pincap 0x0810: OUT
  Pin Default 0x0145f1f0: [Jack] SPDIF Out at Ext Rear
    Conn = Optical, Color = Other
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x02
Node 0x1c [Pin Complex] wcaps 0x40020b: Stereo Digital Amp-In
  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:
  Pincap 0x0820: IN
  Pin Default 0x41c5f1f0: [N/A] SPDIF In at Ext Rear
    Conn = Optical, Color = Other
  Pin-ctls: 0x20: IN
Node 0x1d [Audio Mixer] wcaps 0x200303: Stereo Digital Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x01 0x0b
Node 0x1e [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80]
  Connection: 2
     0x36 0x21
Node 0x1f [Volume Knob Widget] wcaps 0x600080: Mono
Node 0x20 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80
0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 8
     0x39 0x33 0x38 0x3d 0x34 0x3b 0x18 0x1a
Node 0x21 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x1f, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-Out vals:  [0x9f 0x9f]
  Connection: 1
     0x20
Node 0x22 [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80]
  Connection: 2
     0x37 0x21
Node 0x23 [Vendor Defined Widget] wcaps 0xf00100: Mono
  Connection: 18
     0x11* 0x12 0x13 0x14 0x15 0x16 0x17 0x18 0x24 0x25 0x38 0x39 0x3a
0x3b 0x3c 0x3d 0x20 0x21
Node 0x24 [Pin Complex] wcaps 0x40098d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0837: IN OUT Detect
  Pin Default 0x01016011: [Jack] Line Out at Ext Rear
    Conn = 1/8, Color = Orange
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x27
Node 0x25 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0837: IN OUT Detect
  Pin Default 0x01012013: [Jack] Line Out at Ext Rear
    Conn = 1/8, Color = Grey
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x28
Node 0x26 [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80]
  Connection: 2
     0x32 0x21
Node 0x27 [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x05 0x21
Node 0x28 [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x0a 0x21
Node 0x29 [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x04 0x21
Node 0x2a [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x06 0x21
Node 0x2b [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80]
  Connection: 2
     0x30 0x21
Node 0x2c [Audio Mixer] wcaps 0x200103: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80]
  Connection: 2
     0x31 0x21
Node 0x2d [Audio Mixer] wcaps 0x200100: Mono
  Connection: 1
     0x1e
Node 0x2e [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x2f [Vendor Defined Widget] wcaps 0xf00100: Mono
  Connection: 6
     0x11* 0x12 0x14 0x15 0x16 0x17
Node 0x30 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 3
     0x03* 0x04 0x06
Node 0x31 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 2
     0x04* 0x0a
Node 0x32 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 2
     0x05* 0x04
Node 0x33 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 3
     0x3a* 0x25 0x24
Node 0x34 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 3
     0x3c* 0x25 0x24
Node 0x35 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x36 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 3
     0x03 0x04* 0x06
Node 0x37 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 3
     0x03 0x04* 0x06
Node 0x38 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-Out vals:  [0x00 0x00]
  Connection: 1
     0x11
Node 0x39 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-Out vals:  [0x00 0x00]
  Connection: 1
     0x14
Node 0x3a [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-Out vals:  [0x00 0x00]
  Connection: 1
     0x15
Node 0x3b [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-Out vals:  [0x00 0x00]
  Connection: 1
     0x16
Node 0x3c [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-Out vals:  [0x00 0x00]
  Connection: 1
     0x17
Node 0x3d [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-Out vals:  [0x00 0x00]
  Connection: 1
     0x12

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Re: ASUS M2N32 MCP55 HDAudio problems - small solution!

[Takashi Iwai]

At Sat, 01 Jul 2006 11:36:31 +0200,
Daniel Schroeder wrote:
> 
> > Could you attach the content of /proc/asound/card0/codec#* files?
> > Is it really AD1988A, not AD1988B?
> > 
> > 
> > Takashi
> 
> It is a AD1988B

All right, it explains all the weird behavior.

I fixed the detection of AD1988A rev2 chip on HG repo.

> 
> small summary:
> 
>  - out of the box 1.0.12_rc1 recognize my chip as a AD1988A rev.2 ->
> seems to be wrong.
> 
>  - with the "bogus patch" mplayer is working.
> 
>  -  Speaker-Test and aplay are "buggy" or not working as i would expect...

It's likely a problem of BIOS (or hardware).  The driver works fine
with AD1988B reference board here.

>  - hp jack does not mute the other speakers

Should it be?  The behavior depends on the hardware type, and
currently only laptop-style (2-channel, jack-auto-muted) and 3/6-stack
for mobos (no jack-auto-muting).

>  - normal amarok output is a kind of too center/lfe centric (the winamp
> output under windows has a much better sound)
> 
>  - i miss a "rear" volume slider in kmix

It's "Surround".


Takashi

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Re: ASUS M2N32 MCP55 HDAudio problems - solved

[Daniel Schroeder]

Takashi Iwai wrote:
> At Sat, 01 Jul 2006 11:36:31 +0200,
> Daniel Schroeder wrote:
>>> Could you attach the content of /proc/asound/card0/codec#* files?
>>> Is it really AD1988A, not AD1988B?
>>>
>>>
>>> Takashi
>> It is a AD1988B
> 
> All right, it explains all the weird behavior.
> 
> I fixed the detection of AD1988A rev2 chip on HG repo.

thank you :)

>> small summary:
>>
>>  - out of the box 1.0.12_rc1 recognize my chip as a AD1988A rev.2 ->
>> seems to be wrong.
>>
>>  - with the "bogus patch" mplayer is working.
>>
>>  -  Speaker-Test and aplay are "buggy" or not working as i would expect...
> 
> It's likely a problem of BIOS (or hardware).  The driver works fine
> with AD1988B reference board here.
> 
>>  - hp jack does not mute the other speakers
> 
> Should it be?  The behavior depends on the hardware type, and
> currently only laptop-style (2-channel, jack-auto-muted) and 3/6-stack
> for mobos (no jack-auto-muting).

could this be fixed in alsa or is this a hardware only issue?

>>  - normal amarok output is a kind of too center/lfe centric (the winamp
>> output under windows has a much better sound)
>>
>>  - i miss a "rear" volume slider in kmix
> 
> It's "Surround".

O.K.


daniel

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Re: ASUS M2N32 MCP55 HDAudio problems - solved

[Takashi Iwai]

At Thu, 06 Jul 2006 17:43:56 +0200,
Daniel Schroeder wrote:
> 
> >>  - hp jack does not mute the other speakers
> > 
> > Should it be?  The behavior depends on the hardware type, and
> > currently only laptop-style (2-channel, jack-auto-muted) and 3/6-stack
> > for mobos (no jack-auto-muting).
> 
> could this be fixed in alsa or is this a hardware only issue?

It's my question, too.  I have no idea what you realy wanted, and
how your hardware is designed to behave.

On many systems, auto-muting via HP jack is simply annoying.


Takashi

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Re: ASUS M2N32 MCP55 HDAudio problems - solved

[Daniel Schroeder]

Takashi Iwai wrote:
> At Thu, 06 Jul 2006 17:43:56 +0200,
> Daniel Schroeder wrote:
>>>>  - hp jack does not mute the other speakers
>>> Should it be?  The behavior depends on the hardware type, and
>>> currently only laptop-style (2-channel, jack-auto-muted) and 3/6-stack
>>> for mobos (no jack-auto-muting).
>> could this be fixed in alsa or is this a hardware only issue?
> 
> It's my question, too.  I have no idea what you realy wanted, and
> how your hardware is designed to behave.
> 
> On many systems, auto-muting via HP jack is simply annoying.
> 
> 
> Takashi
my old nforce2 mb mutes the other channels if i plug in the hp...but i
think the old mb does this in hardware...

this was a real nice feature...so, i have to deactivate the other
channels in kmix now....this is O.K. :)

the real funny thing about this thread...in Windows the center speaker
is not working in moviez, just like my initial and now fixed problem
with alsa :) And with alsa i have the possibility to mute the other
channels to have only sound output on my headphone...i haven't managed
this yet with windows and i would say, i have not this option to do this
in windows...

conclusion: i love linux on the desktop :)

cheers,
daniel



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Re: ASUS M2N32 MCP55 HDAudio problems - solved

[Takashi Iwai]

At Thu, 06 Jul 2006 18:20:50 +0200,
Daniel Schroeder wrote:
> 
> Takashi Iwai wrote:
> > At Thu, 06 Jul 2006 17:43:56 +0200,
> > Daniel Schroeder wrote:
> >>>>  - hp jack does not mute the other speakers
> >>> Should it be?  The behavior depends on the hardware type, and
> >>> currently only laptop-style (2-channel, jack-auto-muted) and 3/6-stack
> >>> for mobos (no jack-auto-muting).
> >> could this be fixed in alsa or is this a hardware only issue?
> > 
> > It's my question, too.  I have no idea what you realy wanted, and
> > how your hardware is designed to behave.
> > 
> > On many systems, auto-muting via HP jack is simply annoying.
> > 
> > 
> > Takashi
> my old nforce2 mb mutes the other channels if i plug in the hp...but i
> think the old mb does this in hardware...
> 
> this was a real nice feature...so, i have to deactivate the other
> channels in kmix now....this is O.K. :)
> 
> the real funny thing about this thread...in Windows the center speaker
> is not working in moviez, just like my initial and now fixed problem
> with alsa :) And with alsa i have the possibility to mute the other
> channels to have only sound output on my headphone...i haven't managed
> this yet with windows and i would say, i have not this option to do this
> in windows...
> 
> conclusion: i love linux on the desktop :)

Well, from technical POV, adding the auto-hp-mute behavior isn't too
difficult.  But it also reduces the flexibility as you noticed.  And,
if we implement auto-HP-mute, it's better to remove the mute switches
of other channels for usability reason as well as on Windows.  That
is, a single Master mute switch to toggle all on/off.


Takashi

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