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 groups, especially popular during the American folk music revival. In 1973, Paddy Moloney (of The Chieftains) and Sean Potts released the album "Tin Whistles", which helped to popularise the tin whistle in particular, and Irish music in general. Mary Bergin's "Feadóga Stáin" (1979) and "Feadóga Stáin 2" (1993) were similarly influential. Other notable players include Carmel Gunning, Micho Russell, Joanie Madden, Brian Finnegan, and Seán Ryan. Many traditional pipers and flute players also play the whistle to a high standard. Festy Conlon is considered by some to be the best slow air player. Award-winning singer and musician Julie Fowlis recorded