a musical instrument

[olivia]

double reed, polyphonies and four hole are all types of which instrument

[lookslikemik]

It's polyphonic rather than polyphonies, but it's a flute anyway. You can have a pentatonic flute, and there are double-reeded flutes. Four-hole flutes are not too uncommon.

[heymrmiller]

cud b clarinet, sax, flute, bassoon, or oboe.