Also DTS:X and Auro3D, last one sounds or makes the nicest effect’s of em all. At least in a home environment.
But you could get a amp that has em all.
Then you able the change how the amp codes and changes the sound coming from source.
They all change how the surround works and sounds around the listening spot.
There’s also the location where speakers should be for specific surround.
Think Auro handles this also more better since if you have 5.1 already, just add above them for more.
Auro is a much smaller than Dolby so most movies are in that format, but you can still decode that with Auro so sends the effect where they need to be.
If you know the “virtual barber shop” with headphones, That’s what Auro does with surround, its right next to you and sound effect’s are very very nice.
Dolby a bit more away from you and DTS:X is kinda in where speaker line is, outer ring or circle.
Oh and Z also said Auro. In a heartbeat when someone asked.