Just to add, you have to unzip these packages into temp dirs, change to these and run "minstall /*".
right, it was mentioned in the readme
Being a USB driver , means I have to connect an USB audio device to listen ?
[edit] have installed the drivers and plugged an USB audio card, enabled it as USB device in the guest machine (by the Vbox Device menu), connected my hearphones, in the OS2 Multimedia Panel selected the USB Adapter Wave 2 : I can hear something also in the youtube video playing, the sound is very fragmented and the video play with a poor frame rate. The sound fragmentation also happens in wav system audio events, mp4 video with vlc and mp3 audio. Basically it would work but maybe my specific usb audio device is a bottleneck, or maybe the Virtualbox USB filters, or whatever . Standing this situation, is too complicated finding what's preventing to get a decent sound with these drivers (hardware, software, virtualization, exc...)