The double flute is an ancient category of wind instrument, a set of flutes that falls under more than one modern category in the Hornbostel Sachs system of musical instrument classification. The flutes may be double because they have parallel pipes that are connected with a single duct. They may be "double vertical flutes" without a duct. There are also double-transverse flutes.[1]
Double flutes are not the same as double pipes, which are reed instruments.
- ^ Sibyl Marcuse (1975). A Survey of Musical Instruments. New York: Harper & Row. pp. 586–589. ISBN 0-06-012776-7.