....Back yonder in the olden tymes, a lot of time guys didn't acutally know the fingerings for the notes they were playing. So what they would do on their charts were write in p=piston, r=rotor, o=open (neither) p/r=both.
No particular song in mind, just remembering what those charts used to look like.
And the Bobby hug thing.....NO!!! And now that I know I got one coming, I'm whizzed cuz I haven't gotten it yet. However, I'm sure it's going to lose a lot in the translation....IYKWIM