Using this you can play some melodies using the buzzer in Canon cameras with Magic Lantern support
Based on https://github.com/robsoncouto/arduino-songs
You can play any song from arduino-songs using my code
The only thing that you have to do is replace the melody array and tempo variable in my code with the code from the song you have choosen
(also remember to replace C style commenst with Lua style ones in the melody code, just replace any // in the melody code with --)
You can then run the script in any Magic Lantern supporter camera by putting the script into the ML/SCRIPTS folder on your SD/CF card and enabling the Lua scripting module in Magic Lantern menu