4 Ways to Add Notification Sounds on Android - wikiHow
dart - Custom sound push notification does not work (Flutter) - Stack Overflow
Amazon.com: SierraTeck Motion Activated Sound Player, Long Playback Time, Recordable – Independent Living, Point of Sale Advertising, Door Greeter, Entry Alert : Electronics
Mp3 Rintgones for iPhone – The Best Music Collection of Call.er Alert Sound.s and SMS Tones by Branislav Ristivojevic
How to Change Your Android Notification Sound
Got a new phone, and I just had to do it. Also, the encountered theme is my alarm now. : r/metalgearsolid