A duet is a musical composition for two performers in which the performers have equal importance to the piece, often a composition involving two singers or two pianists.
French (le français or la langue française) is a Romance language of the Indo-European family.
HarperCollins Publishers L.L.C. is one of the world's largest publishing companies and is one of the Big Five English-language publishing companies, alongside Hachette, Macmillan, Penguin Random House, and Simon & Schuster.
Italian (or lingua italiana) is a Romance language.
Tacet is Latin which translates literally into English as "(it) is silent" (pronounced:,; or). It is a musical term to indicate that an instrument or voice does not sound, also known as a rest.
In music, unison is two or more musical parts sounding the same pitch or at an octave interval, usually at the same time.