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

[Michael T. Dean]

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