Tin whistle of which tone holes the player should cover. The most common format is a vertical column of six circles, with holes to be covered for a given note shown filled with black, and a plus sign (+) at the top for notes in the second octave. Tablature is most commonly found in tutorial books for beginners. The tonic solfa is found in Ireland and possibly Wales, especially in schools. Many schools have printed sheets with tunes notated in tonic solfa, although in Ireland more have teaching by note. With the availability of good standard notation tutor books, teaching is possibly
Tin whistle made of brass tubing, or nickel plated brass tubing, with a plastic fipple (mouthpiece). Generation, Feadóg, Oak, Acorn, Soodlum's (now Walton's), and other brands fall in this category. The next most common form is the conical sheet metal whistle with a wooden stop in the wide end to form the fipple, the Clarke's brand being the most prevalent. Other less common variants are the all-metal whistle, the PVC whistle, the Flanna square holed whistle, and the wooden whistle. Gaining popularity as a folk instrument in the early 19th century in the Celtic music revivals, penny whistles now play an integral