Flavius Josephus was one of the most amazingly successful personalities of his time period, (at least he thought so), His incredible life story, A.D. 37 to 100, is available on wikipedia etc. Among the many volumes of books he wrote to explain Jewish traditions, theology,and history to the Roman world, he states in Book #7 Chapter 12 paragraph 3 of "Antiquities of the Jews": "And now David being free from wars and dangers and enjoying for the future a profound peace, composed of songs and hymns to God, of several sorts of metre; some of those he made were trimeters, some were pentameters. He also made instruments of music. Now the construction of the instruments was thus: The Viol was an instrument played upon with a Bow, the Psaltery had twelve musical notes, and was played upon with the fingers. And so much shall suffice to be spoken by us about these instruments,that the reader may not be wholly unacquainted with their nature." I have always found this to be one of the most frustrating quotes, no Flavius, we are not "wholly acquainted with their nature" and we would have appreciated more information.