A notification beep. Many hours spent. Nothing...

[Eme Fibonacci]

I'm trying to create a notification beep. Some sound. Something with FX. Do not know yet.

I spent my whole Sunday trying.

Nothing...

Yes, my app will become so famous that I need to worry about it now. This simple sound will be an identity. (Think Positive)

How to create a notification sound?
Are you a musician? Can you do this? Let me know