Horn
The horn, sometimes referred to as the French horn, was a musical instrument from the planet Earth and a member of the brass family.

A song from the ancient Greek comedy The Frogs referenced 's horn, which he sounded for "marking time to the rhyme with his hoof." ()

A crewmember of the  played the horn in a concert held in Ten Forward in the year 2367 The concert also featured Data, Jenna D'Sora and Keiko O'Brien. ()

Background information 
The horn is a favorite instrument of film composers and commonly used for presenting heroic and heralding themes. Alexander Courage used the horn for the opening fanfare call in the original Star Trek opening credits, and this horn call was later used by Jerry Goldsmith for the main theme of  that was subsequently used for . The instrument was also prominently used in the main themes of  and .

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Earth musical instruments