The goal of the machine is to put music on a vinyl record. for that the PC sends the sounds in the sound card, then to the mixer, then to the amplifier. the amplifier is connected to two speakers that make a diamond vibrate.

 The electronic board allows with an LCD screen to:
 Commandant a step motor,
 Send and receive MIDI commands,
 Order a servo motor (for the engraving head position),
 Receive the information from sensors,

 I still have a lot to learn on the lathe cutter but the result is pretty good for an homemade machine so I share a video of my project.

Link of the doc: https://github.com/Mras2an/VinyGo/blob/master/00_Doc/VinyGo.pdf