Abstract: An adjustable string tree provides selectable adjustment for tension on a stringed musical instrument. A back plate is fixed to a base plate, which in turn is fixed to the musical instrument. A top plate adjustably and slidably engages the back plate in order to exert tension on a string. Adjustment may be provided by an adjustment bolt in opposition to a compression spring. In a preferred embodiment, an indentation is provided in the top plate in alignment with the string to better hold the string in association with the top plate.

Abstract: A multi-plane headstock provides different planes to which strings of a stringed musical instrument may be attached to control the tension on the string and the angle at which the string breaks from the plane of the strings over the fingerboard. Advantageous musical characteristics are provided to such stringed musical instruments by implementation of the multi-planed headstock of the present invention in greater selectability and adjustability of stringed musical instrument characteristics, as well as increased internal harmony of the instrument.