[mythtv-users] Per Card Volume Control Bounty started

Brian Wood beww at beww.org
Thu Sep 7 23:56:26 UTC 2006

On Sep 7, 2006, at 5:21 PM, Anduin Withers wrote:

>> This is a feature that has been mentioned many times, but frankly I
>> doubt that it would help the real problem.
> True to an extent, personally I have no problem with the relatively  
> minor
> volume differences between channels (differences one encounters  
> using a
> normal TV), of course I do have that remote and often adjust just  
> based on
> the show.

Some cable systems do a better job than others in keeping audio  
levels consistent. Some just try and rely on AGC circuits that are of  
dubious value as all they can really do is average over a period of  
time, and possibly gate the really hot spikes.

Some networks are better than others as well, the ones with a real  
live operator in master control do better than the totally automated  
ones that are using LMS or server-based systems. HBO is quite good  
for example, while something like the Golf Channel is all over the  
place (not that I would watch either of them though).

My own particular system here does a horrible job but my satellite  
signals are pretty consistent.

It's easier to AGC video levels, since you can key on something like  
the white flag in the multiburst VITS signal which will be at a known  
level at all times.

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