[mythtv-users] AC3, Analog Cable and 5.1
Warren
warren-lists at icruise.com
Thu Mar 23 13:46:32 UTC 2006
Brian Wood wrote:
> On Mar 22, 2006, at 7:04 PM, Michael Heironimus wrote:
>
>
>> That being said, very few TV programs make any real use of Dolby
>> Surround. When I play a DVD I'm surprised if it doesn't have at
>> least 4
>> channel audio, but I'm even more surprised when a TV show on cable has
>> anything on the rear channel. Usually almost everything is through the
>> center channel.
>>
>
> One of the first shows to use surround sound encoding was the old
> "Arsenio Hall" show. This caused a lot of problems because most
> stations transmitting stereo use a "monoguard" to detect and correct
> an out-of-phase condition, which will result in almost inaudible
> sound on a mono receiver. Since the encoding used phase modulation it
> drove the monoguard crazy, switching back and forth trying to correct
> what it detected as a "fault". Stations were given no warning of this
> at all and it was a real problem. Eventually everyone just switched
> off their monoguards for the program but it still created strange
> sounding stuff on a mono set.
>
> Just thought you might be interested in some ancient history.
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>
A similar thing happened when Star Trek: The Next Generation started
their first season. It was in Dolby Surround and made decent use of the
full field. Apparently in NY everything was fine, but when I went to my
parents' house in Florida it sounded like garbage.
W
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