Disable "Audio Focus" in Developer Options → Media → Disable "Duck audio".
: If the installer won't boot, turn off Secure Boot in your BIOS. phoenixosinstaller-v3.6.1 -based on android 7.1-
: Allows users to open multiple apps in separate tabs, similar to a web browser, for efficient multitasking. Integrated File Management Disable "Audio Focus" in Developer Options → Media