MihDi - touchless sound generator

Dance a Melody

• MIDI device that outputs notes (relative to distance) over USB to synthesizer or other sound engines.
• confirmed working on
  • Linux using ams, vmpk, qsynth, amsynth, ZynAddSubFX
  • Android using DRC (Polyphonic Synthesizer)
• powered over USB
• enhanced accuracy and frequency in distance measurement utilizing interrupt routines
• created in summer 2017

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Part list:

• 1 Arduino pro micro (microprocessor board)
• 1 US-015 (ultra sonic distance sensor)
• 6 Potentiometer 10kOhm (change settings)
• 3 2-state-Switches (change settings)
• 4 LED 5V (show status and frequency)
• 1 (micro)-USB cable (connect to synthesizer or programmer)

Connections

to arduino board

Pin	Device	Usage
D2	ECHO US-015	distance sensor receives ultrasonic pulse echo
D3	TRIG US-015	trigger distance sensor to send ultrasonic pulse
D5	Switch1	hold or repeat note on same distance
D9	Switch3	set/unset a minimal distance you need to move to produce a new note
D14	LED1	show frequency of distance measurement
D15	Switch2	change output range between half notes and all notes
D16	LED2	light on sound output
A0	Pot1	volume
A1	Pot2	distance max (1-7 meter)
A2	Pot3	sound duration
A3	Pot4	frequency
A6	Pot5	note height near
A7	Pot6	note height far
5V	LED3,4	show power state

Info

• MIDI output channel is 1, you can change it in code.
• Coding style is not state of the art, feel free to clean it up.
• You can ask about the project at MihDi[at]roboschmie.de
• Report Bugs and Issues

Dependencies

• MIDIUSB