Abstract: A transforming means in a tone changer device for transforming an amount of translational movement of an actuator means to a different or lesser amount of movement to be applied to a rotatable bar member dependently connected for pivoting a pivotable member whereby the tension in a string attached to the pivotable member is varied. A translational movement apparatus connected by control rods to the actuator means may supply approximately equal amounts of movement for increasing or for decreasing the tension in the strings. The translational movement apparatus may comprise a rocking arm and a parallel connected stabilizing rocking arm connected to a supporting member whereby pivoting the arms causes the supporting member to supply approximately the same amount of longitudinal movement for use by control rods. Tuners transfer the longitudinal movement from the translational movement means to the control rods.