UltimateUI guide
How to change a sound's volume and pitch
In this guide, you will learn how to set action sound volume and pitch
You can customize the sound played in Actions by setting its volume and pitch.
This can be done by appending the values to the end of the sound name.
Below is an example of the entity.player.level_up sound with Volume set to 1 and Pitch set to 2:
entity.player.level_up 1,2