This is a replacement for GC4R6BR which I archived due to repeated muggling - too bad, I really liked the original final location. The solution to this one is different but the solve method is the same.
NOTE: Anyone should be able to solve this: you don't need to have read the book, there are no special tools required other than those linked to from the puzzle itself, no math involved, and no knowledge of music notation or theory is required, although you might learn a little bit along the way.
You can validate your puzzle solution with certitude.
Congratulations to kanchan for FTF and KendraH for FTFWDFTO.