196

16501 readers

2862 users here now

Be sure to follow the rule before you head out.

Rule: You must post before you leave.

^other^ ^rules^

founded 1 year ago

MODERATORS

[email protected]

620

Rule! (pawb.social)

submitted 5 months ago by [email protected] to c/[email protected]

43 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 26 points 5 months ago (2 children)

I started paying attention to this stuff back when Dolby Pro Logic was new, which was a pretty clever way to get surround effects using only left and right audio channels. Left and right channels went directly to the front left and right speakers, but it also compared wave forms coming from the left and right channels. Any wave forms that matched got sent to the center channel (like most on-screen dialog) and any that mismatched got sent to the rear surround speakers (noise, ambience, etc). It wasn't perfect by any measure, but it was a pretty clever hack.

[–] [email protected] 8 points 5 months ago

I always thought backwards-compatible FM stereo was pretty cute

transmit L+R channels as before, so they can be picked up and played without trouble with mono equipment, and transmit L-R separately. Just add or subtract to get the L or R channels.

[–] [email protected] 8 points 5 months ago

I knew there was some magic going on with DPL, but I never guessed quite how they did it—that was a surprisingly simple approach in the end!