I guess it depends on the space between staffs/lines on your manuscript paper, and complexity of the music you want to conpose.
A real extra fine nib could get the job done.
A round broad nib might be too big for some line spaces and might create ambiguity in pitches.
It also depends on how fast/slow you want to write. Do you want to just dot and create note to indicate pitch or do you want to take time colouring your note?
I guess a Pilot Custom 74 F (or EF) would work. But certainly not its Music Nib:it is way too broad for lines and spaces on many manuscript papers.
A nib that is able to create different line thickness could be quite useful too. The rather inexpensive Pilot Pluminix (Italic) in Fine comes to my mind.
For good precision, Platinum and Sailor fine and extra fine nibs should be good too. (Their music nibs, at their broadest, are way too broad for content input into small spaces in my humble opinion.)
But if writing with a Music nib somehow gives you the necessary impetus and inspiration, please feel free.
Edited by minddance, 21 January 2019 - 04:56.