snestracker
snestracker copied to clipboard
bazz1tv
Dolby Pro Logic Support
I'm not even sure SPC supports Dolby Pro Logic at this point. And I'm not even sure if the Dolby Pro Logic is done in the SPC/Audio code, or if it's some CPU/HDMA thing that's just done in Post or Pre.
Maybe look at the SPC files for Seiken Densetsu 3, Jurassic Park, Tales of Phantasia, Star Ocean and see if there is an obvious flag or method for it.
What I can readily do is add invert phase buttons for all applicable settings.
SPC did surround via phase inversion. I'd recommend allowing phase inversion of both left and right channels (or either one): I have a nice effect that I use with a very slight pitch difference on one channel that would be interesting to pull off here that I use with inverting the phase of both channels.
Specifically what I'm ready to do is enable the following as phase invertible via a button:
- Main Vol L
- Main Vol R
- Echo Vol L
- Echo Vol R
- Echo Feedback (not sure how this works but the hardware port is signed)
- Each Voice Vol (enabled at the instrument level)
If surround sound needs something more complicated than this, I'd kick it into the future, wait for a patron's request for it, or see what someone else comes up with.
Did some brief research:
- https://www.soundonsound.com/techniques/surround-sound-explained-part-1
- Dolby Pro Logic Specifics: https://www.soundonsound.com/techniques/surround-sound-explained-part-2
- Gems can be found in certain posts at https://www.sega-16.com/forum/showthread.php?28575-SNES-Dolby-Surround-how-does-it-work
SNES Games for Notable Surround Sound
https://gamnesia.nintendoenthusiast.com/articles-throwback-thursday-top-5-uses-of-surround-sound-on-snes/#.VC4QCn_86Ul