Popping [?]
According to Crowley identical with Cranning; NB: ➺ Popping (emphasising octaved notes).
Crowley, Tadhg: How to play the Irish Uillean [sic] pipes [1936]. Cork, 1974 [facsimile], p.14.
O’Canainn, Tomás: Traditional music in Ireland [1978]. London, 1979 (2), ➺ p.85.