DIY VS1053 MIDI Sound Module

This is my second video and describes how to modify a VS1053b Chinese made mp3 player module to use as a fully enabled GM MIDI sound module - able to play 128 wave table instruments as well as a full drum set. Hope you enjoy it.
Update 19/12/2019 - found an error on the opto-isolator midi interface schematic which I have corrected on the link below - sorry about that!
The link to the schematics and other info is:
drive.google.c...