[mythtv-users] No Sound with nForce chipset <--- FIXED!

[David]

That's odd.

I think you may have disabled your PVR350's decoder for sound *and* video.
Now it's using the framebuffer to play video and the soundcard to play 
audio.

Which is going to increase the cpu usage a lot, and probably decrease 
video quality (jerking/tearing?)

Do you have the sound output of your PVR350 piped back into the line-in 
on your soundcard?
And then under alsamixer *unmute* the line-in (and set it as capture)
That gives really quite good analog sound.
s/pdif is more tricky (it doesn't work) because you need to sample the 
line-in at 48kHz and feed it back out the pcm to the s/pdif there is a 
workaround, see here: http://www.mythtv.info/moin.cgi/DigitalSoundHowTo 
for some more hints.

David

Ryan Allen wrote:

>Hi all, 
>
>    Thanks for the support.  Unfortunately, nobody's help pointed me in
>    the right direction.  There seems to be a lot of conflicting info
>    out there, along with a few dead end threads.  I even saw a post
>    somewhere of "Do you have nForce chipset, a PVR x50 and the CD rom
>    as the master device on the secondary interface????"  with no follow
>    up.  (That is my exact setup, so what was up with that).
>
>    ANYHOW, I had to:
>
>    I DISABLED in setup:
>    USE HW XVMC MPEG DECODING
>    (which was on by default) 
>
>    and finally everyting worked.
>
>    -- Ryan
>
>
>
>* John Kuhn <kuhn at razorsys.com> wrote on [06-21-04y 12:00]:
>  
>
>>it might be as simple as editing your .fvmw2 file and changing this
>>
>>#exec KnoppMyth-run
>>exec mythfrontend
>>
>>it seems the knoppmyth-run script will knock out sound in some cases (it 
>>did it to me)
>>
>>--John
>>Mythtv.info
>>
>>Ryan Allen wrote:
>>
>>    
>>
>>>  First off, knoppmyth totally rocks. I wasted a good week trying to
>>>  get Myth to work on SuSE 9.0, then I switched to this. Thanks for the
>>>  good work! 
>>>
>>>  However, I still have NO sound. I've been searching and have found
>>>  references on some sticky thread on my problem, but I cannot find it.
>>>  Here's the lowdown: 
>>>
>>>  It's a MSI MEGA 180 box that has the nForce chipset. 
>>>  Athalon 2500+ (barton) 
>>>  512 M ram 
>>>  PVR 350 
>>>
>>>  Now, I've got everything working, except sound. There is no sound
>>>  out from either the SPDIF, the analog out on the sound card nor the
>>>  PVR. 
>>>
>>>  so looking in /etc/modules.conf it says: 
>>>
>>>  alias snd-card-0 snd-intel8x0 
>>>
>>>  which is wrong, so naturally I did an "lsmod" and as expected: 
>>>
>>>  ---< snip >--- 
>>>  snd-mixer-oss 11640 0 [snd-pcm-oss] 
>>>  snd-intel8x0 17636 0 
>>>  snd-pcm 56000 0 [snd-pcm-oss snd-intel8x0] 
>>>  snd-timer 14088 0 [snd-pcm] 
>>>  snd-ac97-codec 32832 0 [snd-intel8x0] 
>>>  snd-page-alloc 4316 0 [snd-intel8x0 snd-pcm] 
>>>  snd-mpu401-uart 3168 0 [snd-intel8x0] 
>>>  snd-rawmidi 13088 0 [snd-mpu401-uart] 
>>>  snd-seq-device 3824 0 [snd-rawmidi] 
>>>  snd 27940 0 [snd-pcm-oss snd-mixer-oss snd-intel8x0 snd-pcm
>>>  snd-timer snd-ac97-codec snd-mpu401-uart snd-rawmidi snd-seq-device] 
>>>  soundcore 3524 3 [snd] 
>>>  ---< snip >--- 
>>>
>>>  so, I'm thinking I need to compile the nForce linux platform
>>>  drivers. So, I obtained the latest tar.gz and when I type "Make",
>>>  the compile fails with the following (parsed for clarity) messages: 
>>>
>>>  /usr/include/asm/mpspec.h:6:25: mach_mpspec.h: No such file or
>>>  directory 
>>>
>>>  /usr/include/asm/mpspec.h:8: error: `MAX_MP_BUSSES' undeclared here
>>>  (not in a function) 
>>>
>>>  /usr/include/asm/smp.h:73:26: mach_apicdef.h: No such file or
>>>  directory 
>>>
>>>  In file included from nvhw.c:16: 
>>>  nvhw.h:29:27: linux/wrapper.h: No such file or directory 
>>>
>>>  /usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or
>>>  directory 
>>>
>>>
>>>  And a few others. My question is, where did I go wrong, and how does
>>>  one get the nForce audio to work on knoppmyth? 
>>>
>>>  Thanks!! 
>>>
>>>  -- Ryan
>>>
>>>
>>>
>>>------------------------------------------------------------------------
>>>
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>>>mythtv-users at mythtv.org
>>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>
>>>
>>>      
>>>
>
>  
>
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>
>
>  
>
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