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?
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?