How downmixing from 5.1 and 7.1 works in FMOD Studio? And why is there such difference between Studio and engine?

FMOD Studio
4

  1. No, there isn’t a way to stop SRS and instead get 5.1 -> 2.0. ** SRS is only available for Mac and Win however.

  2. In 5.1 the two surround channels are at 110 degrees, where as in 7.1 the surrounds are at 90 and the rears are at 150, so there is some signal distribution during the downmix.