Overtone singing (also called overtone chanting, harmonic or diphonic singing) is a vocal technique in which a single singer produces two clearly perceivable pitches at the same time: a low fundamental drone and a high, flute‑like melody formed from the harmonic series.
By precisely shaping the vocal tract (tongue position, lip rounding, soft‑palate height, and jaw opening), the singer selectively amplifies individual overtones above a continuous drone. Regional styles include Tuvan and Mongolian khöömei (with substyles such as sygyt, khöömei, and kargyraa), as well as Tibetan Buddhist and other Inner/Central Asian chant practices. Modern practitioners also employ the technique in ambient, experimental, choral, and meditative music.
Timbrally, overtone singing ranges from bright, whistling tones to deep, growling textures. Musically it often centers on drones, pentatonic figures, and melodies that trace the natural harmonic series rather than equal‑tempered scales.
Overtone singing is deeply rooted in the pastoral and shamanic cultures of Inner and Central Asia, especially among Turkic‑Mongolic peoples. While the practice likely predates written records, comparable techniques appear in Tibetan Buddhist chant and in longstanding Mongolian and Tuvan vocal traditions that developed around animist worldviews and wide, resonant landscapes where long‑carried sound was prized.
Western travelers and scholars began describing the practice in the 19th century, but systematic documentation expanded in the Soviet era through ethnomusicology in Tuva and Mongolia. Researchers classified distinct styles—such as sygyt (bright, whistle‑like overtones), höömei (balanced, mellow timbre), and kargyraa (low, subharmonic growl)—and connected technique to daily life, herding calls, and spiritual practices.
From the 1980s onward, groups like Huun‑Huur‑Tu and later Alash Ensemble toured internationally, while artists such as David Hykes (and The Harmonic Choir), Michael Vetter, and Tran Quang Hai introduced overtone techniques to Western experimental, choral, and meditative music. Recordings and collaborations with rock, ambient, and contemporary classical musicians further broadened exposure.
Today, overtone singing is both a living tradition in Mongolia and Tuva and a global technique taught in workshops, conservatories, and online. It appears in world‑fusion ensembles, sound healing contexts, film/game scores, experimental vocal ensembles, and solo internet performance, while preserving strong links to its Central Asian origins.
Begin with a comfortable chest‑voice drone on a single pitch (often around A2–D3 for low voices, A3–D4 for high voices). Maintain steady breath support and a relaxed larynx.
•Shape the vocal tract to filter and amplify specific harmonics: raise/lower the tongue (front–back), round/spread the lips, and subtly move the jaw. Think of forming extreme vowel shades ("uu‑ii‑ee‑eu‑oo") to sweep through the harmonic series.
•Two core styles:
•Sygyt/“whistle”: bright, flutelike overtones; narrow lip rounding, high tongue arch; moderate volume.
•Kargyraa: deep, growling fundamentals using ventricular (false‑fold) engagement to create subharmonics; use caution and warmups to avoid strain.