You can easily change the sound of your notification by following the next steps:
1-Go and log into your builder.
2-Go to your business app.
3-click on developers.
4-There in the editable section search the files Notification sound mp3 and Notification sound OGG
choose Notification Sound MP3 Notification Sound OGG
5- Replace both files with yours by clicking the 3 points, you will see a pop-up and select change.
Both files have to be the same otherwise, it won't work
You can use this web to convert your mp3 to ogg https://www.zamzar.com/convert/mp3-to-ogg/
6- When finished click on update
7- Move to build and build apps
8- Click on build test
9- Test if works
10-Finally follow the next article.
Have a Happy Ordering