With very kind @darenager autorisation and suggestions I made some changes to its clever mapping. 
These versions are vertical, maybe you prefer horizontal. I can make several versions if needed.
Any suggestions in order to optimize it are very welcome !
It can be larger to fit more A4 format, I think about writing some words in FULL CAPS (Pickups), add eventual remarks / reminders…
Colors are maybe not the best, I was inspired by OT’s led colors.
Pitch 0 is same pitch as default sample pitch so I used the same green.
Note MappingColorVertical.pdf (205.5 KB)
Note MappingGreyVertical5.pdf (199.6 KB)