Originally posted by: Moth3r
Ah Neil, I knew I could rely on you to reply, thanks for the info.

Originally posted by: Neil S. Bulk
Anytime a matrix Dolby Stereo soundtrack was transferred to a stereo video format, the surround track was carried over, simply because of the way Dolby encoding works.

So how come some videos say HiFi stereo, and some say Dolby Surround?

Hi-Fi- Stereo is actually a recording term for VHS tapes. Hi-Fi on the packaging means the tape has a Hi-Fi track. That was not the standard when VHS first came out. Dolby Surround logos were added later, but once the master was made, the Dolby encoded soundtrack always came through, whether the logo was on the packaging or not. I could bore you with the technical details of the Dolby matrix, but that's not necessary.

Neil