Low whistle grip" may be required due to the distance between the holes. They belong to the same woodwind instrument family of end-blown fipple flutes. Though the tone of this instrument varies subtly among makers, low whistles are generally characterised by a more breathy, flute-like sound than traditional tin whistles. While the precise history of the low whistle is often debated, it is known that various kinds of vertical fipple flutes have existed in antiquity. The fipple flutes developed during the 16th century were the ancestors of today's low whistle, carrying through from early transverse flutes the six-holed design tradition and conical
Tin whistle perfect fourth apart and the natural minor key and Dorian mode a major second above the lowest note. The whistle is identified by its lowest note, which is the tonic of the lower of two major keys whose tonics are a perfect fourth apart that the whistle most easily plays in. Note that this method of determining the key of the instrument is different from the method used to determine the key of a chromatic instrument, which is based on the relationship between notes on a score and sounded pitch. Whistles are available in a wide variety of different keys.