This is another variation of the overtones tuning which includes not only the Swedish troll tuning and the ukulele (venezuela cuatro) but also the charango tuning besides of course the troll tuning and the 3-string Bouzouki tuning is the C2-G2-C3-E3-A3-E4 INTERVALS (5-4-3M-4-5) or in semitones (7-5-4-5-7 ) which is symmetric as we see and in numbered steps of the diatonic scale 1-5-1'-3'-6'-3" It is an open tuning of the root major with 6th as the open tuning of ukulele and charango.
It is balanced tunging as far as the simplest 0ne fret shapes are concerne relative to minor and major chords of the default diatonic scale.
It is balanced tunging as far as the simplest 0ne fret shapes are concerne relative to minor and major chords of the default diatonic scale.
We may compare these tuning with that of the fado guitar that in interavls it is (5-2-5-4-2) E.g. C-G-A -E-A-B) it is an open major chord with 6th and major 7nth
If we concisider that setting the minor one-fret chords at higher strings is an advantage for the minor chords , there is also the inverse order of it , which sets the simple one-fret major chords at the higher strings and the minors at the lower strings which is inverse from the previous.
E,g. for C major it would be E2-A2-E3-C4-G4-C4 with interval structure 4-5-6m-5-4 .
It has an inversed troll tuning and an invered ukulele and charango tuning. It may be considered that although symmetric relative to minor and major it favors a bit the major chords, as it has their simplest shape at the higher in pitch strings
The main advantages (and some disadvantages) of these previous tuning are the next