Foreword By TrâN Quang Hai
This technique enables a singer to produce two simultaneous voices: a continuous drone and a melody of overtones above it.
Overtone Singing
This technique enables a singer to produce two simultaneous voices: a continuous drone and a melody of overtones above it.
Source text is the author's, verbatim. The headings, grouping, and emphasis are mine, added for readability. — Chris
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