[mythtv-users] Life with both ATSC and NTSC tuners
adam.mythtv at thefelsons.us
Sat Aug 13 02:35:25 UTC 2011
On Aug 12, 2011, 7:54 AM, raymond at wagnerrp posted:
>On 8/12/2011 09:58, Adam Felson wrote:
>> 1) There doesn't seem to be any way to match the gains of the two tuners. I can attenuate the
>> convertXs >tuners, but not not the HDHRs. Unfortunately it is the HDHRs that are about 10db louder
>> than the convertXs. >Every time I switch from watching an NTSC program to an ATSC program I get
>> blasted by the volume difference.
>ATSC tuners have no way to control volume, or resolution, or bitrate, or
>anything. They are a digital tuner, meaning the content is
>pre-compressed by the transmission source. They merely receive the data
>stream as it comes to them. That means the ATSC tuner is not 10db
>louder, but rather than NTSC tuner is 10db quieter. Does your ConvertX
>have no volume controls? Perhaps you can insert a preamp into the ALSA
>chain prior to MythTV capturing it.
The NTSC convertx's mixer is at 100%, but still 10db below the ATSC capture devices.
I like your idea of putting in a software preamp in the alsa chain. It might work.
mythtv-users mailing list
mythtv-users [at] mythtv
More information about the mythtv-users