[mythtv-users] Horrible Audio Problems on Video Glitch

[JJ]

Cal wrote:

>Bryan Murphy wrote:
>  
>
>>On Dec 21, 2007 2:09 AM, Cal <cal at graggrag.com> wrote:
>>    
>>
>>>[ ... ] the bottom line is - _only_ mythtv screeches!
>>>      
>>>
>>Yeah, being able to describe the problem (and point the way to
>>possible solutions) is also helpful.  Somebody else in this thread
>>mentioned the term "compander" which I had not heard before, so I've
>>been doing a little more research.  Who knows what doors that might
>>open up.  Anyway, I've done a bit of audio processing myself in the
>>past for my employer, so maybe when I have some more time after the
>>holiday, if I can't solve the problem myself, I might at least be able
>>to point the appropriate people in the right direction.
>>    
>>
>
>As I understand it, a compander involves dynamic compression _and_ expansion
>of the dynamic range, so I'm not sure a "compander" fits the problem. It's
>perhaps in the right ballpark for a bandaid fix though. For the screeches,
>I think just peak limiting might be more appropriate. It's been a while since
>I followed the linux-audio-users mailing list, but it might be worth exploring
>their archives and floating a query there
>  <http://music.columbia.edu/mailman/listinfo/linux-audio-user/>.
>
>It's been a while since I used it, and it's relevance to our myth issue is low,
>but Jamin
>   <http://jamin.sourceforge.net/en/about.html>
>is the only example of audio compression & limiting I'm aware of. An outstanding
>application though.
>
>Health & time permitting, I'd like to take a look at the waveform of the
>screeches. That might give a clue as to whether peak limiting might ease the
>impact. I suspect not though, the deeper problem is the one that counts.
>
>Cheers.
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>
>  
>
Yes, I'd agree that peaklimiting would be a band-aid solution....oh, and 
the reason I'd mentioned a "compander"
is that it'd be really really neat to be able to restore the dynamic 
range that a lot of media has, some is compressed, some
is too dynamic, lol!
Happy ho-ho everyone..
JJ