Absolute volume (media volume sync) introduction：
Usually, both the phone and the earphones have their own volume. Absolute Volume refers to the synchronization of the volume of the Bluetooth earphones and the phone when playing audio, that is, when the volume of the phone is adjusted to the maximum, the volume of the earphones is also the maximum. Absolute volume is also called media volume synchronization.
How to set absolute volume (media volume sync):
1. For realme UI 2.0 and above, an absolute volume switch has been added to the Bluetooth advanced settings interface. The specific path is: Settings > Bluetooth > Advanced/More settings > Media Volume Sync. Turn on this switch, and the phone will turn on the absolute volume function;
2. For realme UI 1.0 and earlier system versions, you need to turn on the absolute volume in developer mode. The specific operations are as follows:
a. Turn on the hidden developer options settings:
Settings > About phone > Tap Version > Tap Build number 7 times, when "No need, you are already a developer." pops up at the bottom of the screen.
b. Set the absolute volume function:
Settings > Additional settings > Developer options, turn on Enable absolute volume function, the phone will turn on the absolute volume function.