I think you are talking about the board which is based on AMD + 780 G chipset and has HDMI out. If it is the same, then audio through HDMI is standard but through analog outs, not on par with say, an add on sound card. It doesn't means, it is bad, but is low on gains. The board is known for is HDMI performance.
In case you are interested, I am planning to sell my HTPC based on this board. PM me if interested.