No specific info about version 4.0. Please visit the main page of C-Media WDM Audio Driver on Software Informer.
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Universal audio-sound device driver for all type of WDM supporting computers
DUO-CAPTURE is an audio driver for DUO-CAPTURE USB audio interface.
Providing free WDM Audio Drivers for kX-Compatible sound cards.
Audio Converter, easy use, convert all media and audio files to audio format.