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It's important to know the electrical comsumption of the instrument. Because in the future it can use batteries for standalone use.
The design will be upgraded to use 3.7 V lithium batteries. (maybe a second version)
I've learned about MIDI signals, protocols and design. It's possible to build whatever kind of instrument using digital fabrication with MIDI protocol.
The easiest and cheapest to design an instrument with no limitation.
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