According to the invention, a musical instrument having a device for tuning tuning bodies is disclosed, a) having at least (12) mechanical tuning elements or tuning element systems, b) wherein the (12) mechanical tuning elements or tuning element systems represent the (12) chromatic notes of an octave, c) wherein in each case a tuning element or tuning element system is mechanically operatively connected to at least one tuning body, d) wherein each tuning element or tuning element system has exclusively octave-related tuning bodies associated with it, e) wherein during tuning of the musical instrument the tuning elements or tuning element systems are actuatable or actuated independently of one another, wherein the tuning elements are embodied as tuning levers and/or the tuning element systems are embodied as tuning lever systems, wherein a tuning lever system has at least two tuning levers that have differently located pivots, wherein the tuning levers are slidingly connected to one another by means of adjacent pivots, and wherein the geometric arrangement of the operative connections of the octave-related tuning bodies and the associated tuning elements in relation to one another is configured in the manner of an intercept theorem.