Creative has released a new set of drivers for the Soundblaster Audigy line (FINALLY) for Windows 2000 and XP only.  For some reason they're available from the Asia site and not the US, but hey, I'll post'em anyway. :)

Added features:

• Provides Dolby Digital decoding from external SPDIF Input.
• Speaker settings in Creative Audio Mixer are synchronized with Windows Multimedia setting.
• New presets and effects added

Fixes:

• Reduces excess reverb in MIDI while using software synthesizer
• Removes glitches when playing MIDI using SoundFonts®
• Removes distortion during AC-3 playback
• Performs recording without playback
• Improves multi channel wave file playback
• Hardware acceleration of Open AL.
• Fixed audio distortion and slow start up when resume from standby
• Fixed elevation bug causing muffled sound in some games

You can grab'em here.