This will access the mixer while the Style Picker is open.
Go to Tab 4.
This will work on 2020 down, the shortcut keys need fixing on the latest 2021 mixer for it to work (should be done soon).
If you are running Biab As Administrator:
To run script only .ahk install
https://www.autohotkey.com/ and set AutoHotKey.exe to Run As Administrator
To run .exe set to Run As Administrator
EDIT: fixed Bass reverb down
EDIT: Slider focus on Mixer
* remove .mp4 from file name and unzip
BB Quick Menu & Mixer.zip.mp4