[mythtv-users] Re: dsp audio with cx8800 cards

Jeremy Stribling strib at amsterdam.lcs.mit.edu
Thu Sep 23 22:48:23 EDT 2004

For the record, this problem was solved by adding 'v4lctl -c /dev/video 
volume mute off' to the /etc/init.d/myth-backend script.

Jeremy Stribling wrote:

> Thanks much, this fixed the problem with tvtime and /dev/dsp . . . I 
> can now hear delayed audio through /dev/dsp when watching video with 
> tvtime (just what the MythTV documentation says should happen).  
> However, I still get no sound in MythTV, using /dev/dsp and /dev/mixer 
> as the sound devices.  I'm still poring through mail archives, though 
> I haven't come across anything that worked for me yet.  Any other 
> suggestions?
>> Message: 5
>> Date: Wed, 22 Sep 2004 13:37:32 -0600
>> From: Brent Fisher <brentfisher at shaw.ca>
>> Subject: [mythtv-users] Re: dsp audio with cx8800 cards
>> To: "mythtv-users at mythtv.org" <mythtv-users at mythtv.org>
>> Message-ID: <6c801c86c7fd44.6c7fd446c801c8 at shaw.ca>
>> Content-Type: text/plain; charset=us-ascii
>> I recently had exactly the same problem - I spent several days 
>> searching for the answer.  It turned out to be that the settings in 
>> alsamixer were incorrect.  I'm assuming that you are using ALSA.
>> You have to set the capture correctly in alsamixer.  This is done by 
>> pressing the space bar on the correct item at which point a red 
>> "CAPTUR" indicator should appear above the device.
>> I have 2 different motherboards with built-in sound chips.  On one of 
>> them I need to set capture on the "Line" item.  On the other, I need 
>> to set it to the "Capture" item.
>> Once you have done this you can actually mute the item and the audio 
>> will still be captured.
>> You may have to experiment a bit.
>> -Brent

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