Spelling Diatonic Half-Steps
To spell the note a diatonic half-step above a given note:
| if the letter-name of the given note is | then the note a diatonic half-step above is | ||||||
| E or B | the next letter plus the sign of the given note | ||||||
| C, D, F, G, or A and the given note is | |||||||
| a flat note | the next letter plus a double-flat | ||||||
| a natural note | the next letter plus a flat | ||||||
| a sharp note | the next letter | ||||||
| a double-sharp note | the next letter plus a sharp | ||||||
To spell the note a diatonic half-step below a given note:
| if the letter-name of the given note is | then the note a diatonic half-step below is | ||||||
| C or F | the previous letter plus the sign of the given note | ||||||
| D, E, G, A, or B and the given note is | |||||||
| a double-flat note | the previous letter plus a flat | ||||||
| a flat note | the previous letter | ||||||
| a natural note | the previous letter plus a sharp | ||||||
| a sharp note | the previous letter plus a double-sharp | ||||||