If you are looking for a tool to create you cdlc songs, please refer to CF cdlc creation guide, which should link you to DLC Builder, but don't forget to grab a copy of a tone database, that has it all if it failed to download one for you.
Hello, this project has reached it's EOL stage and should be archived, it's been a pleasure to help you create Rocksmith and Rocksmith 2014 custom songs.
We stand with Ukraine Coincidentally one of our Devs is Ukrainian, help and support them, please🙏🏻.His discord DM's