MIDI Start

February 7, 2021
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Tangible Interaction

1 Playing with the basics

I started from Tom's MIDI-USB tutorial and understood how Arduino communicate with the synthesizer. I downloaded the SimpleSynth so that I can have the output. I decided to add a channel to make the sound more vivid. So I repeated the melody in channel 1 (0x91) so that the output can have 2 tones.

2 Hedwig Melody

Hedwig Theme

To let the computer sing a song, I need to input the melody series in the Arduino. I found the melody online and it's the peizo speaker version, which meant that the notes defined were frequencies inside of MIDI notes. So I need to convert them to MIDI notes. By using the following table, I successfully converted the notes to MIDI numbers.

MIDI-Frequency Table

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Speed Adjustment

I add a tempo to dynamically change the delayDuration between notes so that I can change the speed of the song.

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Appendix

Full code please view on Github HERE.

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