When I watch captured TV from my PVR500 (either tuner. I'm not using the composite/s-video inputs), I get a very slight audio distortion. It sounds like a gain is set too high somewhere and some audio is clipping. I notice it most during shows with higher frequency sounds, like female voices and higher-pitched music. For some reason, the distortion is very noticable during the shows survivor and lost. I first noticed this in MythTV, however I also get it if I do a 'cat /dev/video0 > test.mpg'. I also still get the distortion if I play back a recording using Myth, xine, and mplayer. I only get it with TV. Music and DVDs sound perfect, so I'm assuming it's not an ALSA problem.
I have noticed this ever since I setup my myth box, about a year ago. I've also tried fiddling with the volume controls in alsamixer and ivtvctl, or now v4l-ctl I guess.
Here are some specs that might help:
PVR-500mce, happens on both tuners.
Chaintech AV-710 (using digital out)
2.6.18 kernel and 0.80 ivtv, although it happened with previous versions
Myth 0.20
and all the latest other stuff as far as I'm aware of, including firmware.
Anybody else experience this? Is this the "tinny audio" problem that people talk about? I thought that was only when using the composite/s-video inputs, which I'm not. Just analog cable-tv straight into the pvr500, no cable-box or anything. I've also tried plugging the cable-tv line straight into the TV, and the sound is normal. Most of the time I don't really notice it. It only gets really annoying during certain shows.
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