Gould arrow quartertone accidentals (24-EDO) (U+E270 – U+E27F)
U+E271
Three-quarter-tones flat
U+E274
Three-quarter-tones sharp
U+E276
Five-quarter-tones sharp
U+E277
Three-quarter-tones sharp
U+E278
Three-quarter-tones flat
U+E279
Five-quarter-tones flat
U+E27A
Arrow up (raise by one quarter-tone)
U+E27B
Arrow down (lower by one quarter-tone)