Very few composers have ever written operatic roles for this voice type with actual notes scored above high F, so these singers typically display these extreme high notes through the use of interpolation in some of the operatic roles already cited above or in concert works. Examples of works that include G6 are the concert aria "Popoli di Tessaglia!"" by Mozart, "Esclarmonde" by Massenet, and "Postcard from Morocco" by Dominick Argento. Thomas Adès composed a high A (A6) for the character of Leticia Meynar in "The Exterminating Angel".