Tin whistle all the holes closed, the whistle generates its lowest note, the tonic of a major scale. Successively opening holes from the bottom upward produces the rest of the notes of the scale in sequence: with the lowest hole open it generates the second, with the lowest two holes open, it produces the third and so on. With all six holes open, it produces the seventh. As with a number of woodwind instruments, the tin whistle's second and higher registers are achieved by increasing the air velocity into the ducted flue windway. On a transverse flute this is generally done by
Tin whistle that the accompanying audio CD is played on a C whistle. Reading directly onto the C whistle is popular for the obvious reason that its "home key" or "name key" is the "all-natural" major key (C major). Some musicians are encouraged to learn to read directly onto one whistle, while others are taught to read directly onto another. The whistle player who wants music to read on to all whistles will need to learn the mechanics of written transposition, taking music with one key signature and rewriting it with another. Tablature notation for the tin whistle is a graphical representation