Audio doesn't work on mobile app

My app’s URL:
Hello, everyone, I am having a bit of trouble here with my app.
As you can see the audio on the app works fine on desktop and on a mobile phone ( before adding it to a home screen) the thing is whenever someone adds the app to there home screen the audio doesn’t work. first, the URL was from a website and it worked fine except on the mobile phone (but it didn’t send an error code ) so I uploaded the audio on my google drive and linked and stuff and it still works fine but when someone adds it to their home screen. I really need help ASAP people are going to be using very soon.