Apparatus for restraining and fine tuning the strings of a musical instrument, particularly guitars

An apparatus for tuning a stringed musical instrument, wherein each string makes a first critical contact with the instrument at a point on the nut of the instrument and a second critical contact at a point on the bridge of the instrument, the apparatus comprising:

• string support means for each string, said string support means including thereon the second critical contact point for each string;
• means in the vicinity of said string support means for securely holding each string;
• means for moving said string support means so as to change the distance between the first and second critical contact points of said strings, thereby changing the harmonic tuning thereof;
• and
• means for moving said string holding means and also said string support means in such a manner as to change the tension in the string so as to fine tune the strings individually but not change the harmonic tuning thereof, while the string is securely held and essentially without changing the distance between the first and second critical contact points of the string.