Analysis of information sources in references of the Wikipedia article "Оганезашвили, Саша" in Russian language version.
The kamancheh's strings were originally tuned in fourths, but are now tuned in fourths and fifths: a-e'-a'-e''. This tuning was standardized by Armenian virtuoso Sasha Oganezashvili (1889-1932) in the early 20th century.