I use my AV-710 for analog 5.1 sound. Have used it off and on for about 2 years now and here's my experience with it.
1. Music and DVD's sound excellent. The higher quality Wolfson DAC runs the rear-most (7.1) speakers which I don't even use. I have used the high sample rate 2 channel just to try it out so it uses this "quality dac" (the one that does 24/192) and really didn't see any improvement. What good is 24/192 when almost everything is only recorded in 16/44.1?
2. For gaming, this card is not so great, but not bad either. If you just run software sound in games, you will get very nice 2 channel sound, better than my other card that does hardware sound, but you lose the 3d positional stuff.
If you tick the box in the Envy24 drivers to support 3d gaming, you get 5.1 3d sound...but the newer drivers use QSound for this and it absolutely doesn't work with most of these Envy24 cards. Older drivers still used Sensaura and they still work fine, but are not as matured.
3. Finally, using the 3d gaming support has never worked as well on this card (over all, but it depends on the game. Volume and position of things is not very good sometimes) as it does on my C-Media based cards. I have an old 5.1 8738 chip and new 7.1 8768 chip card.
I paid $15 each for all 3 of those cards. For that...I can't complain. I use this
C-Media 8768 card now. It seems to do everything I want it to, is better for 5.1 gaming, and has digital out with dolby digital live for later when I get some digital equipment.
I absolutely refuse to use ANYTHING made by Creative Labs. I hate their junk with a passion.