Re: Distorted analog sound when using an HVR-3000

["Eduard Huguet" <eduardhc@xxxxxxxxx>]

Ok, I need to rectify, at least partially, my last message: as you have suggested now, the problem with s-video and composite audio capturing was that the external device volume was set too high, which was apparently saturating the audio input of the card. Lowering it was enough to capture crystal clear sound... in mplayer.

In MythTV, now I have the problem that sound is playing strangelly high-pitched. I really don't know how to explain it... I'm going to perform some research to see if I can determine why sound is clear on mplayer and not under MythTV.

Thanks for your help, 
  Eduard

2008/11/24 Darron Broad <darron@xxxxxxxx>

In message <617be8890811240346r3aae6f31rfab45804419bfade@xxxxxxxxxxxxxx>, "Eduard Huguet" wrote:

hi

>Nothing :(. The results are exactly the same: when I use the analog TV
>input, the sound is bad but understable, but somehow "high pitched" fro some
>reason.

okay. as it stands, analogue TV audio isn't affected by these changes
so no change here is expected. i could see about changing this if you
could live with mono only. however, this really would depend on whether
any of this works for you at all...

>When using s-video or composite (this, capturing sound from LineIn input)
>the sound is completely broken: I'm getting only crackling noise,
>ocassionaly disrupted by some fragments of which it should be the original
>input sound...

if this is the same problem as which has been addressed for analogue
input (LINE-IN) for me on both an hvr-1300 and hvr-4000 then you can try to
attenuate the input level even more to see if it improves things.

>This happens both in MythTV and when using mplayer, like i.e. using the
>following command line:
>
>mplayer tv:// -tv driver=v4l2:device=/dev/video0:norm=PAL-BG:\
>input=1:alsa:adevice=hw.1,0:amode=1:volume=50:immediatemode=0:buffersize=3
>
>Any ideas? I'm using a fresh copy of http://hg.kewl.org/v4l-dvb/ repository.

The volume level can be from 0 to 63 try something even lower (10).
If the volume= option doesn't work as anticipated then
try v4l2-ctl -d /dev/video --set-ctrl=volume=XX as well.

We can look at other things if you have the time for it, e-mail me off-list
and we can look work something out.

cya

--

 // /
{:)==={ Darron Broad <darron@xxxxxxxx>
 \\ \

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