This Buzz Feiten designed tempered tuning system allows guitars to play more in tune than you have ever heard before!

As we all have experienced, a guitar is not an instrument that can play perfectly in tune. When we intonate and tune a normal guitar, even when using a very accurate tuner, we find that chords, especially, don't sound very in tune. For instance, play a C chord and the 3rd might sound sharp. Play an open D chord and the F# is really off. The G may sound pretty good but an E chord's G# note is very off. Go up the neck and play a D shape on the 9th fret (an A chord) and it really beats. Does this sound familiar? So for the sake of illustration, let's say that a regular guitar plays about 80% in tune.

For centuries guitars have been designed and built using unchanging formulas for nut placement and intonation, and for centuries intonation problems have been accepted as an inevitable deficiency of the instrument. But incorrect nut placement and improper intonation methods directly influence intonation. The historical method of intonating each string to itself results in "equal temperament" - an intonation formula abandonned by piano tuners in the 1600's. Equal temperament may be mathematically "perfect", but it is not pleasing to the ear. Guitar builders have tried various methods to improve the guitar's intonation, but none of these methods has produced truly gorgeous, spectacular intonation... until now.