Zither Heaven 22 String Cherry Bowed Psaltery by Zither Heaven, LLC. $109.83. Zither Heaven's bowed psaltery features a triangle shape, which separates the strings to form a diatonic scale on one side and the remaining chromatic notes on the other side. Simply designed and easy to bow, the Zither Heaven psaltery is an ideal instrument for a young child interested in music. Experienced musicians can appreciate the instrument's chromatic capability and resonant sound.