Windows 10: Volume of sound going down on itself

As soon as I start playing a sound, the volume slowly goes down to about 5%. When I toggle "Mute" the sound comes back on for about 1 second and goes down again. I have tried all the solutions that I could find on the web, but no luck yet.
I have tried all 7 options as outlined here: Fix Volume Automatically Goes Up / Down in Windows 10
The next track on my playlist starts with full volume, but again, drops after 1 second. This also applies to the sound on e.g. YouTube videos. Any help would be greatly appreciated.
This issue is NOT happening when playing over Bluetooth or using my headphone.

Windows 10 ver. 2004.19041.329
Realtec Audio drivers (new)
New HP Pavilion Laptop

:)

 

Taptiles Volume

Hi,

I understand the inconvenience caused.

I suggest you to try the steps below and check if it helps.

1. After opening the game, right click on the sound icon in the taskbar and select "open volume mixer".

2. If the particular game is listed, turn down the volume and check the result.

Let us know if you need further assistance.

 

Windows 10 volume turns up by itself

Hi,

To fix sound problems in Windows 10, we suggest that you check this article and follow
the different steps provided in the drop-down list.

In case you need further help, feel free to let us know.

 

Volume up/down sound vibrates too much

When I turn the volume sound up or down, the smooth ding sound doesn't ring and instead, a rough version of that sound plays and its really annoying having to shutdown and restart (that usually fixes it). Now, the sound on other things (like YouTube and
videos on the computer itself) are rough and shaky too!

Is there a way to fix this or am I going to have to keep restarting my computer??