I noticed the other day when I have my sound provider set to Dolby Surround, checking the Environmental Effects box causes unit speech to echo. Changing the sound provider to Miles Emulated 3D does not produce an echo with Environmental Effects. I tried updating my audio drivers, but this didn't change anything.

I have a 5.1 surround setup on my computer, and I'm running Windows 7 with "Realtek High Definition Audio."

My question is, am I losing any sounds by changing to Miles Emulated 3D? Is it capable of surround sound?