Katyusha on Midi Diatonic Button Accordion

For some time already I’m working on self-made Midi Diatonic Button Accordion, here is some music I’m playing on it. The device is a MIDI keyboard in a Diatonic Button Accordion (Garmon or Garmoshka) -like enclosure. This version is based on Arduino Micro Pro, and self designed PCB with Gateron Red switches as keys. The device is recognized as USB-MIDI device and all the sound comes from the PC it’s connected to.