Idiophones – according to Curt Sachs’ instrument classification, idiophones are a group of musical instruments that create sounds primarily by the vibration of the whole instrument. The vibrator (or the source of the sound) in an idiophone is a solid material of fixed, natural elasticity. Usually the whole instrument is the vibrator, so this group of instruments is also called autophones. Idiophones can produce diffused sounds or sounds of specific frequency. Pitch of the sound is determined by physical properties of the vibrating element (primarily its mass).