[mythtv-users] Analog audio on pcHDTV HD-5500 card white noise
finlay at moeraki.com
Sat Jan 3 02:23:17 UTC 2009
Jim Cuzella wrote:
> I have been recently playing around with my new pcHDTV 5500 card, in
> hopes of being able to tune both ATSC and the analog output from my
> DirecTV box. So far I've got the digital input for ATSC working fine
> (as long as my antenna gets good signal). After configuring the analog
> portion of the card as a v4l device, I am able to switch inputs and view
> the analog video from the DirecTV D12-100 set top box (STB).
> My problem is that the audio coming from /dev/dsp1 is complete static
> white noise. I've seen threads having to do with the HD-5500 card's DMA
> access to capture the audio directly from the audio input jack on the
> back of the card (without the need for the line input being connected to
> the sound card on the breakout cable). I am able to plug that loop
> cable into my sound card's line in (and using /dev/dsp), with this, I
> can hear the sound coming from the DirecTV STB. However, with this
> setup I have to switch the mute on and off for line in using alsamixer
> each time I switch inputs. Otherwise the sound from the STB is mixed in
> over everything! Also, the other problem with this is audio/video sync
> is off (audio leads video).
> How can I get /dev/dsp1 to not be white noise?
> For more details on my problem, see my last post on the pchdtv forums
> here: http://pchdtv.com/forum/viewtopic.php?t=7096
How do you get the DirectTV box output into the HD5500? AFAIK the HD5500
audio is only available when receiving analog via the antenna input. If
you're using the S-Video input there's no audio input to the HD5500.
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