Waves MaxxAudio Pro doesn't do anything

The problem is caused by updating MaxxAudio Pro on Microsoft Store. You have to reset your pc and then disable automatic app updates.

You might also discover that your audio stops working after Windows Updates your realtek driver. To solve this problem, see guide below:

1. Go to device manager.
2. Locate and rightclick on the sst driver (Next to the one that is marked as not working! IMPORTANT), choose properties.
3.Driver -> Update driver.
4. Browse my computer.
5. Show compatible -> pick "High definition audio controller" (If you can't choose "High def audio controller", you picked the wrong driver to update, see step 2.)
6. OK

A word of advise though, never update WAVES MaxxAudio Pro to the version on Microsoft store. Once you do, it will stop working and your sound quality will go bad. Unfortunately this can't be undone unless you perform a factory reset.

Good luck.

Hey quick question, I am also currently facing this issue on a Client's machine,

Can you explain where and what the sst drivers are?

I'm afraid my issues may be beyond this fix as the headsets are not evening coming up to be chosen as the audio source.

Go into the Device Manager > Sound, video and game controllers and take a look at the drivers installed on the Realtek Audio device shown here.

You can try 'updating' the drivers by selecting another Realtek driver ["Browse my computer..." and "Let me pick from a list..."].

What appeared to work for me on my new Latitude 7400 was to "downgrade" to the previous version:  Realtek-High-Definition-Audio-Driver_FCPP2_WIN_6.0.8838.1_A09.  The most recent driver set they posted for the 7400 is what got me into this mess to begin with.

After continuing to struggle with audio issues, myself, I'd now like to suggest that you ditch "Realtek" all together.  Take a look at my post under "Dell 7400 Headphone Jack Not Working."

Hey guys, I've just found a strange way to fix that problem (temporarily). 
Step 1: Plug in your speaker 3.5mm jack as usual
Step 2: When "Which device did you plug in?" window pops up, do not choose your usual choice, choose something else. As an example, my device is 'External Speakers' then I'll choose 'Headphones' instead
Step 3: After step 2, Waves Maxxaudio Pro will recognize your device as 'Headphones'. You'll open Waves Maxxaudio Pro software to change the Preset to your usual one (like 'External Speakers')
Hope you all can do it successfully. Stay safe!

Diep, this solution really works!   Many thanks!

@JG3520 Happy to hear that. 

Thanks! 
IT worked for me

Hey, just wanted to know if uninstalling the maxxaudio app could help me, Ive been having this issue with my latitude 5400 since the windows 11 upgrade, my eq would sound extremely bad after booting into windows and id have to reset it every single time. Same issue with headphones.

You're welcome, I'm glad my solution still works these days. It should have been marked as the main solution, I think.