A stringed musical instrument.
Therefore at that time, when all the people heard the sound of the cornet, flute, harp, SACKBUT, psaltery, and all kinds of music, all the people, the nations, and the languages, fell down and worshipped the golden image that Nebuchadnezzar the king had set up. ( Daniel 3:7 )
Bibliography Information"Entry for 'Sackbut'". A King James Dictionary.