noun
sharp or flat note; non-natural note
In music theory, a note that is not part of the natural scale of the key; i.e., an accidental. Contrasts with 幹音 (natural note).
See also: 幹音
ハ長調では、ファのシャープは派生音になる。
In C major, F sharp is a non-natural note.
派生音には、シャープやフラットが
Non-natural notes include sharps and flats.