ADB Commands for USB Sound Card/DAC Installations.
If you do not have ADB downloaded and installed: https://dl.google.com/android/repository/platform-tools-latest-windows.zip
After downloading, hold down Shift and Right Click inside the folder (any blank spot) and click
Open PowerShell window here.
Please note: After typing adb on each command, press Tab if your PowerShell is erroring out to complete the execution step, and then type the rest of the command.
You will have to connect your screen to a Wifi source, and a computer to the same Wifi source. Obtain the IP from Settings -> Wifi -> YOUR WIFI NAME -> Advanced -> IP Address
adb connect IP:5555 adb root adb disable-verity adb reboot adb connect IP:5555 adb root adb remount adb pull /system/build.prop
Edit your build.prop using Notepad++, then paste this at the very bottom.
# Safe Media Bypass for External USB Sound Cards audio.safemedia.bypass=true
This allows the Safe Media Bypass warning adjustment to disable resetting your volume from 100% to 30% when your screen reboots.
Save your changes.
Push your modified build.prop back into the device
adb push build.prop /storage/emulated/0/ adb shell mv /storage/emulated/0/build.prop /system/build.prop chmod 644 /system/build.prop reboot