'Buzz Feiten Tuning System'
In 1992, Feiten patented a new tuning system for guitars, now marketed as the 'Buzz Feiten tuning system'. The architecture of his system makes it possible to tune guitars and basses more accurately, resulting in more accurate tonality of notes played on the lowest 3 or 4 frets, which otherwise frequently play out-of-tune compared to notes played on the rest of the neck. The difference, though subtle, is especially evident in the playing of open chords.
The system requires some minor alterations to the instrument, and can be retrofitted to most guitars that do not already have it. At this writing, the retrofit normally retails for around $139. The Buzz Feiten Tuning System is factory-installed on nine brands of guitars and two brands of basses. There are also several dozen qualified luthiers who are able to incorporate Feiten's patented temper-tuning mathematical formula into their instruments.
The Feiten tuning system can make use of a special guitar tuner featuring "Buzz Feiten presets" — the strings have to be tuned slightly flat or sharp because of the nut's compensations. Feiten's web site contains instructions on how his system can be tuned without such a tuner. The original intonations of the altered guitars must be done by a Feiten-licensed technician.
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