Originally Posted by audit13
You must use the Ati hdmi driver to bitstream HD audio.
Depends on the player you are using.
Originally Posted by lespurgeon
If you are sendign the audio through the HDMI then the AMD driver. If you are sending audio some other way (SPDIF, line-out, etc) you need the realtek.
Wrong Realtek driver. You are talking about the Realtek HD Audio driver for analog soundcards. There is also a Realtek driver for AMD HDMI audio devices.
@OP: What Davinleads said. If you use TMT, stick with the AMD. Any other player, it doesn't really matter. Since AMD fixed the silent stream issue, there's not much difference between the drivers.