An accordion was a bellows-driven musical instrument of Earth origin which was also used by the Klingons.
The Klingon chef aboard Deep Space 9 used to play on a Klingon accordion at his Klingon restaurant. (DS9: "Playing God")
Ensign Doug Bronowski serving on the USS Voyager played the accordion. However, Harry Kim thought that Bronowski did not play the instrument well. (VOY: "Someone to Watch Over Me")