[mythtv-users] Balance volume across tuners

Tom Lichti tom at redpepperracing.com
Thu Jan 18 19:15:09 UTC 2007

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.


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