Sixty-fourth note twenty-eighth note—otherwise known as the "semihemidemisemiquaver" —and even shorter notes, are occasionally found. Sixty-fourth note In music notation, a sixty-fourth note (American), or hemidemisemiquaver or semidemisemiquaver (British), sometimes called a half-thirty-second note , is a note played for half the duration of a thirty-second note (or demisemiquaver), hence the name. It first occurs in the late 17th century and, apart from rare occurrences of hundred twenty-eighth notes (semihemidemisemiquavers) and two hundred fifty-sixth notes (demisemihemidemisemiquavers), it is the shortest value found in musical notation . Sixty-fourth notes are notated with a filled-in oval note head and a straight note stem with
How Sacred Harp music is sung is a note whose duration is increased by half the duration of the base note. It is so called because musical notation uses a dot to express this durational ratio. Traditional Sacred Harp singers often "add dots" to their music, in the sense that they will make the notes falling on the strong musical beat about one and a half times as long as written, with the following note shortened to half of its written duration in compensation. The great majority of the cases seem to involve substitution of the sequence "dotted eighth + sixteenth" for what is written as