Woodwinds and Brass
Although polyphonic wind instruments are relatively rare, they do exist. Multichambered ocarinas are manufactured in a number of varieties, including double, triple, and quadruple ocarinas, which use multiple chambers to extend the ocarina's otherwise limited range, but also enable the musician to play more than one note simultaneously. Harmonic ocarinas are specifically designed for polyphony, and in these instruments the range of the chambers usually overlap to some extent. Cross-fingering enables a single chamber to span an entire octave or more.
Recorders can also be doubled for polyphony. There are two types of double recorder; drone and polyphonic. In the drone type, one tube is tuned exactly like a regular recorder with a range of approximately two octaves, and the other tube is a drone and plays the tonic note of the scale. The polyphonic recorder has two tubes with a range of one major sixth. With overblowing, some notes can be played an octave higher, but it is not possible to achieve the range of an entire octave in one tube with these instruments.
Read more about this topic: Polyphony (instrument)
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