[mythtv-users] 0.20, bad audio, HD-5500

Nathan A. Smith nasa01 at comcast.net
Thu Oct 19 01:34:03 UTC 2006


On Tue, 2006-10-17 at 21:58 -0700, noah at bonfire.homelinux.org wrote:
> Hi, I am slowly getting a couple of HD-5500 cards to work under Mandriva 2007 
> with Myth 0.20 
You're doing better than I am.....  Could you let me in on how to got
the cards working with 2007?  I am having issues I noted here:

http://pchdtv.com/forum/viewtopic.php?t=1790&sid=d9ed73f594c68d33964c6b25727d2cc5

Did you run into similar issues?

Nasa.

> but am having audio probs (also tried svn rev 11570-- no 
> improvement). This is on an ASUS P5W DH board with a Conroe 6600 and a 
> GeForce 7600GT.
> 
> My current problem is that the NTSC audio in MythTV is awful-- it sounds like 
> compressed streaming audio on a very low bandwidth connection. I know the 
> captured audio from the HD-5500 cards is ok, because I can listen to it 
> using:
> 
> sox -t ossdsp -w -c2 -r 48000 /dev/dsp1 -t ossdsp /dev/dsp
> 
> and they both sound fine.
> 
> [Also, the audio from ATSC channels is completely fine as long as long as AC3 
> passthough is disabled-- otherwise I get (undecoded?) static. I'll worry 
> about that after I get the NTSC audio working.]
> 
> I've tried everything I can find or think of. Extra audio buffering has no 
> effect on the bad NTSC audio. I have the following settings:
> 
> Audio output device = ALSA:default
> Passthrough output device = default
> mixer device = default
> 
> In the backend, the audio capture devices for the HD-5500 cards are /dev/dsp1 
> and /dev/dsp2, which are created when the cx88-alsa module is loaded.
> 
> Under ALSA, my capture devices look like this:
> ----------------
> $ arecord -l
> **** List of CAPTURE Hardware Devices ****
> card 0: Intel [HDA Intel], device 0: ALC882 Analog [ALC882 Analog]
>   Subdevices: 1/2
>   Subdevice #0: subdevice #0
>   Subdevice #1: subdevice #1
> card 0: Intel [HDA Intel], device 1: ALC882 Analog [ALC882 Analog]
>   Subdevices: 2/2
>   Subdevice #0: subdevice #0
>   Subdevice #1: subdevice #1
> card 1: CX8801 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital]
>   Subdevices: 0/1
>   Subdevice #0: subdevice #0
> card 2: CX8801_1 [Conexant CX8801], device 0: CX88 Digital [CX88 Digital]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> ---------------
> 
> I'm hoping someone else has had this problem, though I couldn't find it in the 
> archives or elswhere. I'd be grateful for any suggestions. Please let me know 
> if there's more info that I could provide that would help diagnose this.
> 
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