Given all the threads praising the 60 fps 1080p experience, I felt the need to create a thread dedicated to the jaw dropping 5.1 sound in Wipeout HD.
Truely, the surround experience from HD is the best, I have had in any game.
1) The sound effects are clear, distinct, smooth and fits perfectly with the theme.
2) The surround mixing is out of this world; Yes, they are over-the-top, but then again so is the rest of the game. Apart from the first carriage-shooting scene in "3:10 to Yuma" with the DTS master audio track, I haven't had this good a surround experience on my home theater setup.
3) The integration of music is also superb. Both the HD track itself and your own playlists gets integrated seamlessly into the game. I love the effects when you get hit, are shielded, in the air ... etc. It doesn't get annoying and I haven't found myself wanting to turn off the music effects.

Anyhow, I just wanted to make a shout-out to the audio producers on Wipeout HD. I couldn't have asked for more.