My phone did a software update and now I cant hear other caller on the recording.
Help
Android 9 disabled the call recording feature. This is the reason why your own voice is good but the caller's voice is very weak in recordings. No matter what recorder you are using in the market the result is the same. You can test and confirm this fact.
I have checked the Android 9 source code, Google added new limits to block the call recording feature. It is IMPOSSIBLE to bypass he limits without root. So to fix the problem root is the ONLY way to go.
What does rooting my phone do.. how will it affect my phone
Root the phone means get the super user privilege of the phone, then you can allow some apps to access resources in the phone that is limited.
If Boldbeast gets root access it can change audio settings, so it can fix recording problems. Without root it can't do so because of the permissions.
There are more than 10000 Android phones, the root approach is different from phone to phone, please google "Root S9" to know how to root your phone.