RPi 0W - How to stop long-running action

cross-posted from: https://infosec.pub/post/12005873

I have a Keybow MINI hooked up to a Raspberry Pi Zero W, and I'm using Python to respond to events. I have one button that kicks off playing a song on a passive buzzer, and I'm wondering if there's a way to have a button press stop the song before it completes.