I can't change the default sound of notification using push

#1

hello i have a project using push ( https://ionicframework.com/docs/native/push/ ), i can send notification with GCM and I need to change the default notification sound to a custom, and reading the documentation I am can’t do it. Anyone know how I could do it?

ionic-info:

My code:

Relative path of my sound:

/platforms/android/app/src/main/res/raw/biurl.mp3