FIX EQUALIZER APO NOT WORKING IN WINDOWS 10

1. Open the Configurator program by searching for it in Start.
2. Select your device (Speaker - in my case - or Digital Output) and check “Troubleshooting options“.
3. Choose “Install as SFX/EFX (experimental)“.
4. Restart Windows.

via: https://bradshacks.com/fix-equalizer-apo-windows-10/