All of my plugins require [CGMZ] Core installed above them in the Plugin Manager: https://www.caspergaming.com/plugins/cgmz/core/
Viewing post in [CGMZ] Battle BGM Control for RPG Maker MZ comments
No problem. So, in the plugin parameters, double click the Enable Switch parameter and set it to a game switch, for example mine is set to switch id = 50:
Then, in your game, make an event that turns that switch ON, like so:
Interact with the event that turns the switch to ON and then enter battle and you should hear any battle bgms you have set up that are eligible to be played.