Sometimes you need to write a simple score, or just a few bars or notes. With these brushes you can do it without problem in Photoshop or Procreate. It is not intended for professional music writing, but for taking quick notes (which can be read later ;-) )

I find it really useable to use them with the ipad when I read some sheet music or when I have to take some quick notes in the rehearsals. The only requirement: Photoshop or Procreate.