Continued from above... Plug rear speakers in to #9 and wait for Waves... Plug subwoofer in to  #10 and wait... Open Waves control panel and click Playback. Move slider to turn Equalizer on. Make sure "Select Output" is set correctly. Now you can select music type, adjust bass etc to your needs. Save the profile with unique name (not a Waves pre-set name). You can save different profiles, each with new name for different types of music. Last one used will be loaded at next boot. But you can select a different profile in the Waves control panel...
This issue baffles me! The audio (from XPS 8930 running Windows 10 to plugged in speakers) only works on certain and very few occasions. I initially thought the issue was the speakers/connections, but I left You Tube running and out of the blue, audio started working ruling out the speakers/connections which I'd previously checked. So I can hear audio watching this vid for example: [URL] (please kindly note that I am not promoting this vid in any way, it's just one of the very few vids I can hear the audio on). But I can't hear audio via Spotify, other You Tube channels or vids I've recorded myself. Does anyone have any thoughts? I've checked all the obvious issues: Sound settings, volume mixer, trouble shoot etc many times. Thank you.
XPS 8930, issue only some audio working