← All tunings
Guitar tuning
All Fourths
The odd major third between G and B removed: a perfect fourth between every pair of strings.
Electric · 6 in line
Acoustic · 3 + 3
6th
E2
82.4 Hz
5th
A2
110.0 Hz
4th
D3
146.8 Hz
3rd
G3
196.0 Hz
2nd
C4
261.6 Hz
1st
F4
349.2 Hz
Note names won’t tune your guitar.
Knowing the strings should read E A D G C F is the easy half. Landing each frequency — and knowing whether you are nine cents flat or three — is the half that needs an ear or an instrument.
1
Open Dial and play a string
It listens as soon as you play. Nothing to press.
2
Turn each peg until the needle centres
Two strings tune up a half step: B to C, and high E to F.
3
Check the remaining strings
Changing tension on one string shifts the neck slightly. The rest usually need a nudge.
Get Dial for iPhone
Standard tuning free
Alternate tunings, one-time unlock
Alternate tunings, one-time unlock
What All Fourths is for
One scale shape works identically everywhere on the neck, the way it does on a bass. Jazz players and theory-minded improvisers favour it — the fretboard becomes regular at the cost of familiar open-chord grips.
A few chords to try
Em
Open
Am
Open
C
Open