[mythtv-users] Balance volume across tuners

Tom Lichti tom at redpepperracing.com
Thu Jan 18 20:58:46 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:
>>>> 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.

It's here: http://www.gossamer-threads.com/lists/mythtv/users/222723#222723

Tom



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