EDIT: Whenever I post, it starts a new page...The forum must know how important my posts are
Anything that converts the digital signal to something that outputs sounds on headphones is a DAC. But I guess you're reffering to head-fi's term of a DAC, in which, yes, the Pro/Wired has a DAC, but I owned the pre-2010 wired version which didn't have that feature, so I dunno exactly how the new one's USB DAC functions.
Technically I think all the mixamps are DACs when used with optical cables, as they decode the Dolby Digital 5.1 into an analog dolby headphone signal. When used with RCA inputs, with the dolby pro logic turned OFF, it is just an amp.
Also, I've never plugged a mixamp pro into a computer with USB to test it, but from what the manual says the usb connection can be used for strictly voice voice communication OR as a straight up DAC:
From the Mixamp Pro Manual:
"Simple USB Method: The ASTRO Gaming USB MixAmp can simply be connected with the supplied USB cable, enabling both game audio and voice communication with a single connection. Although this is a simple and easy way to connect, by combining both of these audio streams together on one cable, the MixAmp™ will not be able to function as a “Mixer”. That is, the BALANCE control will not function."
"When used with a PS3/PC, the USB cable may aslo serve as a dedicated voice input/output connection. When used in conjunction with a seperate cable for main (game) audio, you'lll be able to fully control the voice/game mix with the balance dial on the Mixamp."
Using the MixAmp to its Full Potential: Connecting Two Audio Sources:
By connecting game audio and voice communication separately (using the USB cable for power/voice, and a separate cable [Optical/Coax] for main/game audio), the MixAmp™ becomes an audio hub that enables full control over voice-to-game balance in hardware, even when you are playing a game. Most voice over IP (VoIP) programs have a provision to use a USB device as their voice input/output option – if you have such an option, select the ASTRO Gaming USB MixAmp as your audio device.
So it sounds like the mixamp CAN just work over a single USB, but Astro wants people to just use the USB for voice/chat and use a seperate input for the game audio in order to mix things.
Can someone with wired pro mixamp confirm that you can plug in NOTHING but a USB cable and get proper dolby headphone sound from the computer?
Edited by chicolom - 1/15/12 at 12:10pm