sentence: Artificial harmonics are written with diamond-shaped note heads.
sentences_before: A violinist can place his or her finger very lightly on a string so that it divides the string into half. By placing his fingers in other places he can get more harmonics, e.g. by touching the string a quarter of the way down he gets the next harmonic.
sentences_after: They are very hard to play well.
concept_name: artificial harmonic
headings: Harmonics (music) Playing harmonics on instruments
categories: Music theory Sound