The equalizer works well here with the same laptop and driver. Try saving your adjustments as a new profile to keep them from reverting to default.

Sorry, this didn't work. I still have the same problem.

Literally tried 20 combinations on installing, cleaning previous files, etc. I can not get Waves MaxxAudio Pro Equalizer working. When I uninstall manually and W10 installs the old version of Realtek (and Waves), everything works, but old driver has sound quality (and other system level) issues.

I just wish that original 21 Jun 2018 driver was available to download. Some other drivers have an archive of old drivers, but not Realtek audio.

I am thankful to anyone who has it and willing to share.

exactly the same issue, I think it might have something to do with this year's windows 10 spring update

I am sometimes wondering, is there an official way to report bugs to Dell?

try the following drivers (these were listed for the Dell XPS 13 9360 but may work on the XPS 15 9560):

6.0.1.8475 A11 (recently released)

6.0.1.8245 A12

remember to uninstall the existing Realtek audio driver first before installing the new one.

Note about Win10 v1803: the 1803 release of Win10 is still somewhat buggy, so revert to an older release of Win10 like 1709 if the 1803 version is causing more problems than the older Win10 release (and wait for MS to fix the problems with the 1803 update).  Use either wushowhide.diagcab or windows update minitool to hide any unnecessary updates (or hide the 1803 feature update if using an older Win10 version).

I don't want to beta test (but I tried your drivers with no luck). My real purpose with this thread is to point out to Dell that there is a bug in the audio software. And also, if Dell has official bug reporting system, so I could bypass this public forum.

Same audio issues here.  Have tried uninstalling and reinstalling mutiple times.  We really need access to the prior driver version. Speakers work for me bu Max audio software doesn't open and headphone jack doesn't work.

page for all Dell XPS 15 9560 downloads:

http://downloads.dell.com/published/pages/xps-15-9560-laptop.html

there is no "bug reporting system" from Dell that I could find, Clarke1 so don't bother looking for one.