Saxophone
A saxophone was a metal musical instrument of the woodwind family from the planet Earth. This instrument, with its characteristic single-reed mouth piece, was used in jazz and dance music. 

Benny Russell had a saxophone in his apartment in Harlem in the 1950s. ()

Ensign Harry Kim took up the alto saxophone in 2376, after he'd stopped playing the clarinet. ()

While he was temporarily given command of a Kraylor transport in 2377, he brought with him his saxophone, his Starfleet Academy diploma, and a certificate commemorating the Apollo 11 quadcentennial to decorate his ready room. ()

Later that year, Ensign Kim was practicing his sax when Lieutenant Paris asked to sleep on his couch, after Paris' wife B'Elanna Torres kicked him out. ()

During a musical recital in early 2378, Harry Kim played his saxophone. A month later, The Doctor mentioned to Kim that he told Torres that his playing reminded him of a wounded targ, and apologized for his indelicate behavior. ()

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de: Saxophon
Earth musical instruments