Mad Shirmps posted a review on the Creative Sound BlasterX G6 7.1 HD Gaming DAC and External USB Sound Card A quote from the article:

The latest Sound BlasterX G6 DAC and external sound card is very flexible in terms of supported platforms, but also features important upgrades over the G5. We do have now a future-proof 32-bit/384kHz, 130dB DAC that is combined with separate amplification for each channel, marketed as Xamp. The amplifier supports up to 600 ohm headphones and with the G6 we also have now Dolby Digital Decoding. Scout Mode was been introduced quite some time ago and applies certain filters in-game, for hearing more clearly footsteps, weapons and should give you an advantage. For easy operation, we do also have a hardware button for Scout Mode, but also for switching between different preset profiles or for choosing the amplification.

 Creative Sound BlasterX G6 7.1 HD Gaming DAC and External USB Sound Card Review