Call me lucky I guess, but I have had none of the sound volume issues or crackly pops reported by others on my Supermicro C2SBX board with Realtek ALC883 chip. In the BIOS I have "Azalia Audio" set to "AUTO" (only other choice is "DISABLED"), which causes the use of the onboard Realtek audio.
I also only have a single "sound device", shown as "Realtek High Definition Audio" with the Realtek 12/25/2009 6.0.1.6013
driver.
After my first mistaken upgrade method a few
driver releases ago which amazingly enough failed to see the instructions calling for "run this installer file TWICE... once to uninstall current
drivers, followed by re-boot, and then run the installer file a second time to actually install the new upgraded
driver version", I've not made that mistake again.
So, when I failed to follow the instructions, the effect of running the presumed upgrader was actually just to uninstall the existing Realtek
drivers. Following the reboot I had some kind of generic MS audio device recognized with some generic MS driver installed I guess. Don't recall exactly (nor whether it even produced sound), because it was only there temporarily until I finally ran the Realtek installer for the second time and realized that was what I was supposed to do all along.
Anyway, my "playback devices" actually show THREE choices: (1) Realtek HDMI Output, presumably from my ATI HD4850 video card, (2) Speakers, corresponding to the Realtek High Definition Audio device and which is green-checked as the default, and (3) Speakers, corresponding to a USB Audio DAC which I think must be coming from my outboard Pinnacle 710-USB hardware that supports importing external analog and digital video to Pinnacle Studio software.
I have an Altec-Lansing 641 speaker system (four satellites plus sub-woofer) that is sitting at "default volume" (i.e. the way it comes on right after plugging it in). "Quadrophonic" specified in Configuration. In Properties, I have Realtek HD Audio Output at 60, Microphone and FrontMic muted, CD Audio at 0 and Line In at 0. Under Enhancements I have Environment, Equalizer, speaker Fill, and Loudness Equalization checked... with "None" for sound effects. Default format is 24-bit, 48K Hz (studio quality).
And if anything I find apparent volume under Windows 7 with the Realtek
drivers to be LOUDER than how things work under WinXP Pro. In fact, I have to TURN DOWN the various Mixer sliders from their 100% setting, both the master Volume (which I have at 60%) and the sliders for individual applications (e.g. System Sounds is at 24%). Otherwise, its TOO LOUD!
This is all fine, by me. Winamp playing MP3 of Otis Redding's "White Christmas" sounds stunning... clear, loud, noise-free. No complaints.