[mythtv-users] wintv-pvr-usb2 audio clipping

[Rich West]

On 5/23/2012 5:04 PM, Rich West wrote:
> On 05/22/2012 03:37 PM, Michael T. Dean wrote:
>> On 05/22/2012 10:18 AM, Rich West wrote:
>>> Interesting information.. thanks, Mike!
>>>
>>> Anyone know if there is a V4L2 UI setting within mythbackend?
>>>
>>> The approval factor went down a bit when the recordings from that device
>>> started blasting everyone in the room.  I've noticed that I'm seeing a
>>> lot of the following in dmesg, which results in the audio being reset
>>> back to the screemingly loud and very clipped default.  So, I put a very
>>> crude hack in to reset the audio back to a more comfortable setting
>>> every 3 minutes and after each channel change.  However, I admit it is a
>>> crappy hack, and it still results in the initial 3 minutes of audio
>>> screaming in its clipped way at everyone..
>>>
>>> I wasn't able to find any module settings while allowed for passing any
>>> defaults for audio.. :(
>>>
>>> I'm tempted to upgrade the machine, effectively undoing my move from one
>>> of my PVR-150's to the USB PVR, to handle all of the hardware (3 PCI
>>> PVR-150's, 5 SATA drives), but finding a motherboard with those specs
>>> while staying on the cheap hasn't been easy. :-(
>> On the capture card configuration in mythtv-setup for V4L (not DVB)
>> capture devices, there's a setting to tell MythTV not to set the
>> volume of the capture card.
>>
>> Do not adjust volume
>> Enable this option for budget BT878 based DVB-T cards such as the
>> AverTV DVB-T which require the audio volume to be left alone.
>>
>> (where I assume it talks about using the analog/V4L side of DVB-T
>> cards--likely a cheap frame grabber?)
>>
>> Mike
> Thanks again!  I'll test that out this evening.  I had set the capture
> card as an MPEG2 capture device, like the PVR-150's.

Unfortunately, those options don't exist for the WinTV-pvr-usb2 device. :( 
Ah, well, back to the drawing board.  Perhaps it is time to upgrade my
motherboard for my backend system after all...

-Rich