Build your own vMix Surface Control for 4 Inputs using Arduino Uno / nano ch340
The communication between vMix and arduinos via Hairless MIDI & LoopMIDI
Its simple. Just Download the files and uploaded to Arduino.
I already compiling the library and the code into hex, all you do just uploaded to arduino using Xloader
Mapping the controller to vMix MIDI shortcut. See the videos for details
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https://www.youtube.com/channel/UC8OII-ChNi8z7lyj5VCs_Yw