From Creative Technology:
The driver contains optimized support for Windows 2000/XP operating systems and is designed for use with all current models of Sound Blaster Audigy audio cards.
Creative Audigy 4 Drivers
The driver contains optimized support for Windows 2000/XP operating systems and is designed for use with all current models of Sound Blaster Audigy audio cards (all existing Sound Blaster Audigy Card to SB023x models). Features includes: drivers are WHQL Certified; 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.Sound Blaster Audigy 4 Driver
The package includes the following 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. This package supports English, Brazilian Portuguese, Chinese Simplified, Chinese Traditional, French, Dutch, German, Italian, Japanese, Korean, and Spanish.