This is a sample program that plays a tune on an Arduino. The program has been optimized to consume as little SRAM (variable memory) as possible for long melodies. Furthermore, other code can be executed while music is being played, since no delays are used to play the music.

A more elaborate article about the project can be found on the official Arduino Project Hub: https://create.arduino.cc/projecthub/jonathanschneibel/tiny-tune-optimized-audio-playback-2e4c9b.

Tested on an Arduino UNO.

In order to run the program, compile and upload the following files to your Arduino:

• tiny-tune.ino
• tunes.ino
• pitches.h
• libraries/ArduinoThread (library by Ivan Seidel)

Use playTune() to start playing the tune. Use cancelTune() to stop playing the tune. Edit getTuneData() in tunes.ino to change the sample tune or add your own tunes.

This is the hardware setup I used for testing: