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- Newsgroups: rec.video,rec.video.production
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- From: fontana@iguana.cis.ohio-state.edu (Mark Fontana)
- Subject: Re: Computing Surround Sound; adding surround to home videos
- Message-ID: <1992Nov15.171450.9320@cis.ohio-state.edu>
- Keywords: An odd question, but...
- Sender: news@cis.ohio-state.edu (NETnews )
- Organization: The Ohio State University Dept. of Computer and Info. Science
- References: <1992Nov12.054614.29516@foretune.co.jp> <4430@vidiot.UUCP>
- Date: Sun, 15 Nov 1992 17:14:50 GMT
- Lines: 31
-
-
- (Vidiot) writes:
- (Robert J Woodhead) writes:
- ><I'm thinking of fooling around with some digital audio hardware
- ><on my Macintosh, and was wondering if there are a set of equations
- ><or an algorithm that is publically available that will let me
- ><encode surround sound.
-
- >It is a lot easier than you think. You only really have to worry about
- >two audio channels - left and right. To output the center channel, you make
- >the left and right channels equal. To make the surround channel you change
- >the phase (180 degrees) of the left or right channel.
-
-
- Right. This works, more or less. I haven't got a real Dolby processor
- yet, just the poor man's setup described here every few days.
-
- Has anyone gone and added surround to their home videos (presumably,
- while dubbing an edited 2nd generation copy to a final 3rd generation,
- or else by painfully syncing sound and audio-dubbing?)
-
- I imagine you could simply take your l/r audio line INs and add a third
- RCA connector across the two center pins of the existing connectors
- for the surround channel. To add a center channel, you'd just need
- a mixer and a panpot set at center, right?
-
- Are there any consumer-level Dolby A encoding boxes? Is there much
- more to it than this?
-
-
- Mark Fontana
-