Sixty-fourth note going downward when the note is above or on the middle line of the staff. When the note head is below the middle line the stem is drawn to the right of the note head going upward. A single 64th note is always stemmed with flags, while two or more are usually beamed in groups . A similar, but rarely encountered symbol is the sixty-fourth rest (or hemidemisemiquaver rest, shown on the right of the image) which denotes silence for the same duration as a sixty-fourth note. Notes shorter than a sixty-fourth note are very rarely used, though the hundred
Grace note notes is always noted in terms of exactly half of its principal note, but may be double or more. Where they are multiple, their proper notation must always equal exactly half of the principal note. (i.e. If the principal note is a quarter-note the grace note must be notated as an eighth- note, two sixteenth notes, four thirty-second notes, or eight sixty-fourth notes, if we are to set aside the concept of unnatural subdivisions of the beat such as the triplet, etc.) Grace notes, unlike what are referred to as cue-notes, never affect the rhythmic subdivision, or musical "count" of