I'm using a Moto G6. With the latest update of Android 9, they removed the possibility of using the built-in Dolby Audio equalizer for a stupid reason. I found this article reddit which allowed to modify the APK for this to work. I followed all the steps. I decided to try the steps of the 20 band equalizer and I made a backup of the previous work before starting. However, when I finally managed to install adb DaxUI2.apk, it did not work. I had this error:
adb: failed to install DaxUI2.apk: Failure (INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.dolby.dax2appUI signatures do not match previously installed version; ignoring!)
It was sad, but not serious, right? Because I've already had a backup. I renamed the DaxUI2 folder to DaxUI2broken, renamed my backup to DaxUI2 and tried it again, with only the first part (without the appendix). Once I did that, however, I had exactly the same mistake.
I would like to be able to solve this problem, so if someone knows how, tell me please! Thank you in advance.
(added later) Initially, I had posted this on superuser, apparently it was off topic (sorry, I have not used it for a while), so this is a copy pasted. In addition, I would like to add that I do not know anything about it, but that the guide seemed to work for other people. Thanks in advance!