- Post
- #91406
- Topic
- Another Q for you audio experts - Stereo vs. Dolby Surround
- Link
- https://originaltrilogy.com/post/id/91406/action/topic#91406
- Time
Originally posted by: Moth3r
Example: I have "Die Hard" on VHS from the early 90s, and the case says "HiFi stereo sound" - but since this was a Dolby mix in the theater, this will actually be Dolby Surround on the tape.
Is there any scientific way of finding out if an analogue stereo signal has Dolby Surround encoding? Apart from listening to it through a pro-logic decoder. I'm thinking more along the lines of TV broadcasts; if you feed any stereo signal into a pro-logic decoder you will get some steering to the rear channel, how can you tell the difference between something like The Simpsons which is broadcast in Dolby Surround or some other program which is plain stereo and any rear channel output you get is unintentional?
Example: I have "Die Hard" on VHS from the early 90s, and the case says "HiFi stereo sound" - but since this was a Dolby mix in the theater, this will actually be Dolby Surround on the tape.
Is there any scientific way of finding out if an analogue stereo signal has Dolby Surround encoding? Apart from listening to it through a pro-logic decoder. I'm thinking more along the lines of TV broadcasts; if you feed any stereo signal into a pro-logic decoder you will get some steering to the rear channel, how can you tell the difference between something like The Simpsons which is broadcast in Dolby Surround or some other program which is plain stereo and any rear channel output you get is unintentional?
I think most of the dialogue on a prologic encoded stereo track goes to the centre channel. I once read somewhere that the only way to tell if it's a true prologic soundtrack is to disconnect front left and right speakers and listen for any bleed of dialogue from centre to rear if it's EXCESSIVE BLEED chances are it 's just a stereo track.
