Some time ago I was looking for a way to get a system audio equalizer and I accidentally found an application that can be very useful for all of you!
As you know, OnePlus 7 Pro has Dolby Atmos support, but controlling it is limited to 3 presets, we cannot control the sound ourselves, we can only do it after connecting headphones, previously I had the Galaxy S9, which also has Dolby Atmos, but there is full access to the equalizer that significantly improves the sound quality, which is why I was surprised that OnePlus does not give us such a possibility, as far as I know equalier for the speaker was once available in the global version of the software, but later they removed it in the update.
It turns out that we can control Dolby Atmos ourselves, only the phone settings application does not allow it, but you can work around it!
In these few steps you will get full control over Dolby Atmos and even be able to turn it off:
Step 1: Download "Minimal ADB and Fastboot" to your computer, then enable USB debugging on your phone, then connect the phone to the computer and run the file "cmd-here", which you will find in the folder with ADB and Fastboot.
Step 2: Now you need to debloat the Dolby Atmos system controller, to do this, you must enter the following commands in the fastboot console: (don't forget to allow USB debugging on your phone! After connecting the phone to the computer, the phone will ask you if you allow it)
adb shell pm uninstall --user 0 com.oneplus.sound.tuner
If you don't do it then the Dolby settings will reset once in a while, e.g. after a system reboot, that's why you had to do step 1 and 2 first before downloading the application.
You can also restore Dolby system settings at any time using this command in adb shell, but I don't recommend doing it if you want to use another Dolby control app:
cmd package install-existing com.oneplus.sound.tuner
And you're done! From now, Dolby Atmos control takes place only in this downloaded app, this is not any typical equalier you will find on Google Play, it is a Dolby system controller which means that it will work all the time, it will not be turned off when you close the app, this app replaces the Dolby system settings you just turned off.