Update your onboard HD sound from Realtek to the latest driver release. ĮDIT : Longest supported does not necessarily equate with "best" or even good, IMHO. Realtek High Definition Audio Codec (Windows 7 / 8/ 8.1/ 10 64-bit).
Have you tried the Audigy RX drivers ? AFAIK, it uses the same EMU chip as the Audigy 2ZS. Creative USB Sound Blaster Audigy 2 NX SB Audigy 2 ZS Video Editor Audio. Unless someone knows where to get WIn-10 drivers for this sound card ? Windows 10-64, Windows 10, Windows 8.1-64, Windows 8.1, Windows 8-64. I will have to say this was the best sound Creative labs manufactured. Since this sound card was supported for such a long time. It was supported in Win98 thru Win-10 up until recently when Microsoft and Creative labs discontinued support in Win-10
You might find that basic card use will probably be fine and be equivalent to onboard of today but things like DTS, EAX, THX. The Sound Blaster Audigy 2zs was the Best Sound Card Creative labs ever produced. They 'were' pretty good but now Driver support is iffy Microsoft stopped support but Windows 10 20H1 update (using the Audigy RX patch) seems to have got most of those cards working. It was supported in Win98 thru Win-10 up until EAX 4.0, containing DirectSound and Open AL API extensions, to utilize the EAX 4.0 ADVANCED HD Multiple Environment feature This package contains the files for installing the Creative Sound Blaster Audigy 2/ZS Driver. Intel486dx33 wrote on, 16:21: The Sound Blaster Audigy 2zs was the Best Sound Card Creative labs ever produced. Mutes all audio output when the Platinum Drive or Audigy 2 Drive's 'Push Mute' button is pressed once.