Drawbar

As found on certain instruments including the famous Hammond Organ, a Drawbar, sometimes referred to as a Tonebar, controls the volume of a given sound on that instrument. Pulling a Drawbar out (towards you) will increase the volume in incremental steps. Pushing the Drawbar in (away from you) decreases the volume of that Drawbar. There are typically several Drawbars on a given instrument; there are two sets of nine Drawbars on the Hammond Organ, for instance. The configuring of the Drawbars allows for an almost endless array of sounds.