This isn't so much a recommendation as it is a REQUIREMENT. virtual surround devices REQUIRE Dolby Digital in the console space and a 5 to 7 speaker configuration in the Windows panel on PC. If you're feeding SBX a stereo signal, you're 100% doing it wrong which is why it would sound absolutely incorrect. No DTS, no PCM. It 100% must be Dolby Digital when not using a PC. On PC, windows MUST be set to 5 speakers or 7 speakers.