The setup.sh is a bash script for RetroPie on the Tinker Board or Tinker Board S
All other files are the changes I've make for baground music or other extra the scrit will pull them when and if needed.
wget https://raw.githubusercontent.com/RetroPie-Expanded/Armbian-Setup-for-RetroPie/master/setup.sh
sudo chmod a+x setup.sh
./setup
Then answer Y to all questions, and follow on screen prompts at the end.