[mythtv-users] Chaintech 7NIF2 Sound Problems

[Ben Brown]

I wouldn't mind using a dedicated sound card, but I can't find a low 
profile card anywhere.  I've already modified the backplates on my 
current cards to fit into the low profile case.  If you or any one knows 
of a lowprofile audio capture card I'd love to know where to get it.  I 
don't care about the sound out, I can continue to use the onboard card 
for that, I just need sound capture.

Thanks
Ben

Dalen Kruse wrote:

>Hmmm.....  A little strange that two people have this working fine with
>full-duplex.  I tried the NVIDIA OSS drivers and ALSA drivers.  With both
>drivers, I had my mythbackend giving me a message that my sound hardware
>wasn't reporting full-duplex capability.  I'm not sure if it's a hardware
>or driver issue.
>
>Also, I've noticed on this list that there are two versions of this board.
> The "older" board with SPDIF headers on the board and a "newer" board
>without the headers.  I have the newer board.  My board also does not use
>the nForce2 MCP-T chipset for sound.  It has a separate CMedia chipset. 
>Perhaps the older boards are using the MCP-T which has full-duplex
>capability?????  I don't know.
>
>What I do know is that my life has been much more enjoyable since I
>disabled the on-board sound and started using a dedicated sound card. 
>YMMV.
>
>
>
>  
>
>>I've got a 7NIF2 running full-duplex just fine.  I've got a TV Wonder VE
>>in a custom (gutted component cd player) case with the audio output
>>going into the line-input of the motherboard.  Volume control works
>>perfectly.  The only problem I've had with the sound is a strange
>>buzzing (live tv and recordings) that went away when I bumped up my mp3
>>frequency to 48khz.  Now everything is working wonderfully in live tv,
>>recordings, dvds, etc.
>>
>>Matt
>>
>>
>>
>>
>>    
>>
>>>This was my fear.  I've built this into a half height Case, and I'm
>>>not having any luck finding a half height sound card.  so I'ts buy a
>>>new case or buy a new card.  Thanks
>>>
>>>
>>>Ben
>>>
>>>Dalen Kruse wrote:
>>>
>>>      
>>>
>>>>I was having the same problems with that board.  What I found out
>>>>        
>>>>
>>(someone
>>    
>>
>>>>correct me if I'm wrong) is that the on-board sound does not support
>>>>        
>>>>
>>>full-duplex.  If your experience is like mine, it sounds great when
>>>playing a sound file through XMMS or watching TV with XawTV, but
>>>horrible when watching TV with Myth.
>>>      
>>>
>>>>There are three solutions to this problem.
>>>>
>>>>1. Make this machine a dedicated backend that only does the
>>>>        
>>>>
>>>recording. That way you don't need full-duplex sound.  The downside
>>>is that you'll need another machine for a dedicated frontend.  Most
>>>expensive option.
>>>      
>>>
>>>>2. Dump the bttv card and buy yourself a PVR-250 or -350.  The sound
>>>>        
>>>>
>>>is encoded directly into the MPEG-2 stream, so your on-board sound
>>>doesn't need to do the recording.  Second most expensive option.
>>>      
>>>
>>>>3. You can do what I did.  Disable the on-board sound in your BIOS
>>>>        
>>>>
>>>and find yourself a separate full-duplex sound card.  I'm currently
>>>using a SoundBlaster Live 5.1 PCI card and it sounds great.
>>>Depending on where you buy it, this card can run you $35 to $50.  If
>>>you do get a separate sound card, MAKE SURE it will do full-duplex.
>>>BTW, stay away from CMedia chipsets.  The older ones (i.e. 8739)
>>>supported full duplex, but cut the sampling rate in half so you still
>>>had terrible sound.
>>>      
>>>
>>>>Hope this helps.  This was my most frustrating part of building my
>>>>        
>>>>
>>>Myth box.  It's running rock solid now and I'm very happy with the
>>>results.
>>>      
>>>
>>>>--B
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>>>I know this isn't the alsa mailing list, but I know many people use
>>>>>          
>>>>>
>>>this
>>>      
>>>
>>>>>board in their Myth Boxes, so I thought I'd ask.  Is anyone using
>>>>>          
>>>>>
>>>the
>>>      
>>>
>>>>>onboard audio for sound capture.  I have this board with a bttv
>>>>>          
>>>>>
>>>card, and I'm getting horrible audio.  When I aplay /dev/dsp the
>>>audio is really crackly, and it plays at a set volume.  Changing the
>>>master volume doesn't affect the sound output at all.  Playing other
>>>sounds works  fine.  Xawtv sounds fine and the volume controls work.
>>> It's only
>>>      
>>>
>>>>>the playing the dsp that doesn't work.
>>>>>
>>>>>The sound from the bttv card runs into the cdaudio jack on the MB,
>>>>>          
>>>>>
>>>and I'm using alsa 1.03 and the latest Nforce drives on Mandrake
>>>9.2.
>>>      
>>>
>>>>>Has any one had similar problems?
>>>>>
>>>>>Thanks
>>>>>Ben
>>>>>_______________________________________________
>>>>>mythtv-users mailing list
>>>>>mythtv-users at mythtv.org
>>>>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>
>>>>_______________________________________________
>>>>mythtv-users mailing list
>>>>mythtv-users at mythtv.org
>>>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>_______________________________________________
>>>mythtv-users mailing list
>>>mythtv-users at mythtv.org
>>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>      
>>>
>>_______________________________________________
>>mythtv-users mailing list
>>mythtv-users at mythtv.org
>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>    
>>
>
>
>
>_______________________________________________
>mythtv-users mailing list
>mythtv-users at mythtv.org
>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>  
>