One of the simplest musical instruments of the wind kind. It is played with a mouth-piece at the end, and the notes are changed by opening or stopping the holes ranged along the side. The German flute differs from the former, the end not being put into the mouth, but closed by a plug, and the lower lip being applied to a hole about three inches from that end. As usually constructed, this instrument has six open holes, and a seventh hole closed by a key, as in hautboys, bassoons, etc.; but numerous improvements-have been made in them, and they are now frequently made with eight or even ten keys, by which the fingering of many musical passages is much facilitated.