hi I finished my yocto just thought I'd share some of the issues I encountered on the way
The burning the boot loader post is not Mac friendly , you must show contents to find the hardware folder
You may need to install a driver for the ARDNUINO board on a Mac
When I flashed the ATMEGA my yocto wouldn't go into sysex recieve mode , just all step lights lit holding down 1,3,5 did nothing , turned out I hadn't soldered in two of the sequencer chips
Had no cowbell or cymbal , the jumper cables between the main board and output board had broke connection
High hats were barely audible I had 470 ohm where 470k resistors should be and vice versa
Snare sounded tubby and clap wasn't right .... Bad op amp in the noise section