A main system is provided with one or more subordinate systems pivotally connected thereto. The subordinate system can be programmed as desired to move in reference to the main system by the provision of a magnetic attraction acting upon the subordinate system to control the relative movement thereof against a resistance to movement such as may be provided by a hair spring reacting between the systems. One embodiment includes a tone arm of a record player (the main system) having a stylus assembly mounted in a carrier (the subordinate system) with the carrier being pivotally connected to the end of the tone arm for horizontal movement relative thereto and having a hair spring operatively connected between the systems acting as a resistance to movement of the carrier relative to the tone arm. An extension or support extending from the carrier carries a magnet upon the distal end thereof which reacts with a spaced and stationary ferro-magnetic shoe so that as the stylus tracks across the associated record, the interaction of the magnet with the shoe positions or programs the carrier and hence the stylus whereby the stylus tracks all grooves tangentially.