I've been scratching my head as a way to write down #Solresol efficiently.

The following works by accenting letters based on their chromatic distance from the next, so that in every two syllables, the second sound is present merely as an accent to the first.

This plays on the particularity of Solresol of being written entirely with only 7 characters, so that with 3 diacritics placed above a letter to represent the distance of a higher note, and below for a lower note.

https://wiki.xxiivv.com/site/solresol#calligraphy