STEP 4: Device options Start by turning off most things. Super X-Fi (should be off already from setting 7.1 earlier) Equalizer (but more on this in Step 5) Crystal Voice Direct Mode Scout Mode Encoder (unless you’re piping your TOSLINK optical to an AV receiver that can decode Dolby Surround, in which case you’ll want this on) Time to turn on the surround processor. Select Acoustic Engine Turn on Surround, set it to whatever you like. On my X4 anything above 30 creates a really awful reverb, YMMV. Turn on Crystalizer, and set it to 0. Keep everything else off.