BLOX can be used to to play notifications via the Onboard beeper, or more complicated projects can be done via external I2S Audio decoder modules

BLOX provides a couple default noises you can use to signify events with an audible notification using the “Play Notification” block.

BLOX can also play custom melodies provided in RTTTL format

RTTTL stands for Ringing Tone Text Transfer Language, a simple text-based format used to encode monophonic ringtones for mobile phones, particularly for older models before the advent of polyphonic and MP3 ringtones. It was in use for a very long time, so there are thousands of RTTTL melodies available online:

Find some examples on

• https://picaxe.com/rtttl-ringtones-for-tune-command/
• https://github.com/neverfa11ing/FlipperMusicRTTTL
• https://huggingface.co/datasets/cosimoiaia/RTTTL-Ringtones

Simply paste the RTTTL string into the “Play RTTTL Melody” block