MKR Zero & SimpleAudioPlayerZero Library

Hi There

I am playing around trying to make a music player using a MKR Zero and SimpleAudioPlayerZero Library https://www.arduino.cc/en/Tutorial/SimpleAudioPlayerZero

It all appears to be working correctly however I would like to be able to add a stop button but this library holds while playing the track. I've tried using the Scheduler but this doesn't appear to work

Does anyone know a way around this ?

Many Thanks

James