Tuning systems for stringed instruments

A stringed instrument comprising:

• a body;
• a neck attached to said body;
• a fretboard having first and second ends arranged on said body;
• a nut assembly mounted on said neck at one end of said fretboard, said nut assembly comprising a plurality of individually pivotable string holders in combination with a fixed nut having a plurality of corresponding nut critical contact surfaces;
• a bridge including a plurality of bridge critical contact surfaces mounted on said body spaced from an opposing end of said fretboard, said plurality of bridge critical contact surfaces arranged at a selectively adjustable distance from corresponding ones of said plurality of nut critical contact surfaces;
• and a plurality of strings each having a first end and a second end and a predetermined length extending between said first and second ends, said plurality of strings extending across and being in contact with said plurality of bridge critical contact surfaces and corresponding ones of said plurality of nut critical contact surfaces and being secured at said first end to said bridge and at said second end to corresponding ones of said plurality of individually pivotable string holders so that said plurality of strings are under tension to permit obtaining of musical notes upon strumming or plucking thereof, said second end of said plurality of strings being selectively moveable with corresponding ones of said plurality of individually pivotable string holders along a path including a vertical component, said bridge including tuning means for obtaining at least harmonic tuning upon adjusting said distance between said plurality of bridge critical contact surfaces and said plurality of nut critical contact surfaces.