Quantity   Component name
1 × Justboom Amp/Dac To convert the output from the Pi into audio for the speaker
1 × Raspberry Pi To run the software and output audio
1 × Arduino Pro Micro To read all sensor input from the hardware and pass commands to the Pi
1 × Speaker To play dem glorious tones!
1 × Air Pressure sensor To control Note on/note off and velocity of note
1 × Totem Maker Kot https://totemmaker.net/product/totem-maker-kit/
1 × Rotary Encoder to allow for adjusting range of notes
1 × button To reset the range quickly