I got this long winded response from VIA but it does end with good news for us Windows 8 users.
VIA provides Windows 8 audio drivers for VIA audio chips that meet the Windows Logo Premium requirements, which can be found at the driver portal. These are general sound effects drivers with common functions. System manufacturers and motherboard vendors customize audio hardware and software, so to ensure optimal sound quality and compatibility, we strongly recommend you obtain the system-validated and certified audio drivers directly from your system manufacturer or motherboard manufacturer, not from VIA.
The following VIA audio solutions do not meet the Windows Logo Premium requirements and therefore are supported by Microsoft's in-box audio support:
- VIA Vinyl HD audio: VT1708, VT1708A
- VIA Vinyl AC'97 audio codecs: VT1612A, VT1613, VT1616/B, VT1617/A, VT1618
- VIA AC'97 integrated solutions in the following VIA South Bridge chips: VT82C686A/B, VT8231, VT8233/AC, VT8235 & VT8237/R, VT8251
If your system uses one of these VIA audio solutions and you are having audio issues using Windows 8 (32- or 64-bit), it is recommended that you install a sound card which has Windows Logo Premium driver support under Windows 8.
Note: Later versions of the VIA Vinyl VT1708 family of HD audio codecs, denoted by letter suffixes e.g. VT1708B, VT1708S, do meet Windows Logo Premium, and drivers for Windows 8 can be downloaded from this site.
Windows 8 drivers for the Envy24 line of audio chips (Envy24 MT/DT/GT/PT/HT-S and VT1723) are under development.
Thanks in advance,
The VT1731 is curiously absent from the list but it is Envy chip so hopefully that list is not exclusive.
Edited by ciphercomplete - 4/16/13 at 10:30am