Very important tuning information!

How do I tune?

There are some important things you need to have clear when you tune a TT guitar. For instance tuning the open strings – except for the A string – to an ordinary chromatic tuner will not work with a True Temperament guitar, as the open strings are not tuned in equal tempered intervals.

The Thidell Formula One temperament is built around fret positions and tuning offsets. Each set of Curved Frets™ is designed to specifications derived from our exacting Dynamic Intonation™ fret position process.

All tuning offsets starts from zero cent in the "equal" temperament.
Chromatic tuning offsets:
E= -2, F= 0, F#= -4, G= +4, G#= -4, A= 0, Bb= -4, B= -1, C= +2, C#=-4, D= +2, Eb= -4.
Open string tuning offsets:
1st E4=-1, 2nd B3=-1, 3rd G3=+4, 4th D3=+2, 5th A2=0, 6th E2=-2



Why can´t I use a standard guitar tuner?

Tuning the open strings – except for the A string – to an ordinary chromatic tuner will not work with a True Temperament guitar, as the open strings are not tuned in equal tempered intervals.

Non programmable tuners can be used to a certain point. For instance like this:

Tune the 5th A string and F on the 6th E string.
Tune the rest of the strings by ear and check the octaves around 1-5th fret.
Then check the octaves around  the 12th fret.

If all octaves sounds the same, your instrument is well intonated.

Which tuners for a True Temperament guitar do you recommend?

We recommend the programmable strobe tuner Sonic Research Turbo Tuner ST-300 stomp box. It comes with True Temperament as a preset. High precision +-0,02 cent. Works both as in open string and cromatic mode (for intonation). 

Just recently PST – Precision Strobe Tuner app, made in USA by James Campbell – made an update which included the True Temperament tuning. This superb strobe tuner for iOS: iPhone and iPad, is available in the App store, at a low cost. We strongly recommend all iOS TT-players to download this very accurate guitar tuner!

How to navigate PST to the True Temperament mode:
Tap [Settings] and use [Next>] to navigate to the Note Tracking Mode page.
Tap [Guitar] and use [Next>] to navigate to User Bank 1.
Tap [>] to navigate to Fixed Bank 5 and the True Temperament mode.
Tap the [Enable Button] and then tap the [Done Button].
Ready to tune your TT guitar!
The TT page stays in the display, when you open the PST app next time.
More info: www.precisionstrobe.com

How do I adjust my guitar’s intonation after installing a TT-neck?

You do it In exactly the same way you would intonate with a standard neck – by matching the open string notes to the octave (12th fret) notes.

Can I tune down?

Of course you can! A TT-equipped neck intonates superior to any straight fretted neck. You can tune down within sensible limits. The limitation on how low you can go before the intonation craps out depends on the string gauge. Thinner ones can become too floppy and difficult to intonate when tuned down.

What happens when True Temperament guitars are used with other guitars, bass, piano etc?

It works just fine together with “ordinary” instruments. The offsets from Equal Temper are not so severe that they create any dissonance whatsoever.

True Temperament offsets info

Offsets (in cents) for programmable tuners for the open strings are as follows:

E

A

D

G

B

E

-2

0

+2

+4

-1

-1

If you are tuning by ear, you should always take an A note as reference when tuning to another instrument. Tip: the 5th fret harmonic on the A string, and the 5th fret note on the high E string, should both be A=440Hz. (Or A=442Hz, etc, if that is what your band uses.)

Cromatic offsets in cents from equal temperament as follows:
E -2, F 0, F” -4, G +4, G” -4, A 0, Bb -4, B -1, C +2, C”-4, D +2, Eb -4.

Recommended TT tuners