I just purchased A30's and the MIx Amp. I can not hear music, games sounds or video sounds through headset. I can hear myself when I test them through Ventrillo, and the guys in Ventrillo can hear me.
I have the setup as follows.
A quick Disconnect cable from A30's to the AMP Headphone Jack under the Amp power button. (This I call the Front).
The rear has the USB cable going from AMP to USB on my PC.
The TOSLINK cable is plugged into Rear of AMP and then to my PC TOSLINK jack.
I have no onboard sound card. What do I need to do to hear sound ? lol..
For those that are PC savy. My motherboard is an ASUS P6X58D Premium.