Custom Sound Alerts for Ex4s

Hi I need the code for adding a custom wav file for call and one for put per currency pair. For example eur-usd-call.wav and eur-usd-put.wav

This is the code that’s there now but it has the same alert for both call and put. Is this possible and what would be the specific code to add and where to put it? Thanks!

extern string soundAlertFile = “w3.wav”;