Sixty-fourth note

In music notation, a sixty-fourth note (American) or hemidemisemiquaver (British) is a note played for 1/64 of the duration of a whole note (or semibreve). It lasts half as long as a thirty-second note (or demisemiquaver).

Sixty-fourth notes are notated with a filled in oval note head and a straight note stem with four flags. The stem is drawn to the left of the note head 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. Multiple adjacent sixty-fourth notes may have the flags connected with a beam.

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 twenty-eighth note (otherwise known as the semihemidemisemiquaver or quasihemidemisemiquaver), and even shorter notes, are occasionally found.

The names of this note (and rest) in European languages vary greatly:

Language	note name	rest name
Dutch	vierenzestigste noot	vierenzestigste rust
German	Vierundsechzigstelnote	Vierundsechzigstelpause
French	quadruple-croche	seizième de soupir
Italian	semibiscroma	pausa di semibiscroma
Spanish	semifusa	silencio de semifusa
Polish	sześćdziesięcioczwórka	pauza sześćdziesięcioczwórkowa
Portuguese	semifusa	pausa de semifusa
Russian	шестьдесят четвертая нота	шестьдесят четвертая пауза

"Semifusa" derives from the mensural notation corresponding to the modern sixteenth note.