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[[Image:Flageolette.svg|thumb|280px|Playing a harmonic on a string. Here, "+7" indicates that the string is held down at the position for raising the pitch by 7 semitones.]]
Playing a '''string harmonic''' (a '''flageolet''') is a [[string instrument]] [[musical technique|technique]] that uses the [[node (physics)|nodes]] of natural [[harmonic]]s of a musical [[string (music)|string]] to isolate [[Overtone|overtones]]. Playing string harmonics produces high pitched tones, often compared in timbre to a whistle or flute.<ref>[[Roger Kamien|Kamien, Roger]] (2008). ''Music: An Appreciation'', p.13. Sixth "brief" edition. McGraw Hill. {{ISBN|978-0-07-340134-8}}.</ref><ref>[[Claude V. Palisca|Palisca, Claude V.]]; ed. (1996). ''Norton Anthology of Western Music, Volume 1: Ancient to Baroque'', glossary, p.601. Third edition. W. W. Norton. {{ISBN|0-393-96906-1}}.</ref> Overtones can be isolated "by lightly touching the string with the finger instead of pressing it down" against the [[fingerboard]] (without [[fingering (music)|stopping]]).<ref>[[Claude V. Palisca|Palisca, Claude V.]]; ed. (1996). ''Norton Anthology of Western Music, Volume 1: Ancient to Baroque'', glossary, p.601. Third edition. W. W. Norton. {{ISBN|0-393-96906-1}}.</ref> For some instruments this is a fundamental technique, such as the Chinese [[guqin]], where it is known as ''fan yin'' ([[wiktionary:泛音|泛音]], lit. "floating sound"), and the Vietnamese [[đàn bầu]].
==Overtones==
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