[mythtv-users] Balance volume across tuners

Mark Knecht markknecht at gmail.com
Thu Jan 18 20:37:42 UTC 2007


On 1/18/07, Tom Lichti <tom at redpepperracing.com> wrote:
> Mark Knecht wrote:
> > On 1/18/07, Tom Lichti <tom at redpepperracing.com> wrote:
> >> Mark Knecht wrote:
> >>> On 1/18/07, Tom Lichti <tom at redpepperracing.com> wrote:
> >>>> jk-myth at kleeh.com wrote:
> >>>>> The volume level for channels on my HDHR is significantly lower than
> >>>>> channels tuned with the PVR-500 - is there a way to set volume levels per
> >>>>> channel or per tuner?
> >>>> No. I tried to start a pledge to get someone to develop it, but it
> >>>> didn't generate any interest. What I did was a bit of a hack, but it
> >>>> works for me. I have 2 PVR-250's, a PVR-150, and an HDHR, the PVR150 is
> >>>> significantly quieter than all the other tuners (by 12db, if I recall
> >>>> correctly) so I commented out the code in Myth that sets the volume, and
> >>>> I manually set the volume for each PVR card at boot time (quiet the
> >>>> 250's and raise the 150) and the volume levels are pretty much bang on
> >>>> now. The HDHR records the audio at whatever the stream contains, so
> >>>> there is nothing you can do there, but it appears that the audio levels
> >>>> are fairly consistent in the digital recordings I am getting.
> >>>>
> >>>> Tom
> >>> Tom,
> >>>    What commands do you use to set volume levels on your cards. I also
> >>> have 150's and 250's and have the same problem.
> >>>
> >>> Thanks,
> >>> Mark
> >> Sorry, fumble fingers hit the wrong key...
> >>
> >> I have 2 PVR-250's and one PVR-150, in that order they get set with this:
> >>
> >> /usr/local/bin/ivtvctl -d /dev/video0 -y volume=58950
> >> /usr/local/bin/ivtvctl -d /dev/video1 -y volume=58950
> >> /usr/local/bin/ivtvctl -d /dev/video2 -y volume=65024
> >>
> >> That is with IVTV 0.4.x, newer/older versions may differ.
> >>
> >> Tom
> >
> > Thanks much. I'll check that out.
>
> You do have to comment out some code in myth and recompile, since myth
> sets the volume at the start of recordings. I think I've posted the
> patch on the users list, I can dig it up again if needed.
>
> Tom

I'll do some searching but if it's easy for you to find then please
feel free to post it again or send it to me off list.

Thanks,
Mark


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