This project is a website to help you transform BlHeli_32 and Bluejay (RTTTL) sounds into each other.
You can also transpose sounds to a lower or higher pitch so that BlHeli_32 and Bluejay are ok with your sounds. Bluejay goes lower, BlHeli_32 goes higher. Search online for your favourite Nokia ringtone using the RTTTL keyword. Bluejay uses the same syntax for the startup sounds as the old Nokia ringtones!
Visit this page to get started with developing yourself. Otherwise, feel free to put up an issue if something isn't working as expected or you have a suggestion.