No specific info about version 4.0. Please visit the main page of C-Media WDM Audio Driver on Software Informer.
Universal audio-sound device driver for all type of WDM supporting computers
These are audio drivers for Windows Vista, Windows XP or Windows 2000.
DUO-CAPTURE is an audio driver for DUO-CAPTURE USB audio interface.
McIntosh Audio Driver allows you to edit Media player audio settings.
Providing free WDM Audio Drivers for kX-Compatible sound cards.