When people talk about retuned guitars in the British folk tradition, they often begin with Davy Graham and DADGAD. That is understandable, as it is one of the most widespread alternative folk guitar tunings, but it isn't the whole story.
Graham’s earliest documented use of DADGAD dates from the late 1950s, and it is clearly audible on recordings such as She Moved Through the Fair and Rif Mountain. I suspect the tuning was not chosen purely as an exotic effect. Its purpose was more likely practical. By removing the third, it reduced temperamental friction, supported drones, and made modal harmony physically manageable on the instrument. It was a response to musical need, not an act of invention for its own sake.
A closely related logic appears almost immediately elsewhere.
By 1968, Joni Mitchell was using DADEAD on recorded material. I Had a King from Song to a Seagull is a documented example. Again, the motivation is not display. DADEAD functions as a suspended D sonority, avoiding the third, sustaining drones, and allowing melody to move independently of harmony. The tuning simplifies certain musical problems, and that simplification is precisely its strength.
Martin Carthy, of course, made sustained and highly developed use of DADEAB, later transposed down to CGCDGA to suit vocal range and projection. This is, to me, the most successful solution, for reasons I will come to.
The interesting thing here is that the core of both these tunings is DADEA. When transposed to CGCDG, we arrive unequivocally at double C banjo tuning, the high g now being played with the fingers instead of the thumb. This tuning is well documented in five string banjo practice from the early nineteenth century and is likely older still. Its purpose is identical. It supports drones, facilitates modal thinking, and sidesteps the instability of thirds on fretted instruments. For that matter, the intervallic pattern of Graham's DADGAD corresponds in direct transposition with 'Sawmill' banjo tuning.
The guitar, in other words, is inheriting from much older traditions.
It is a commonly held belief that CGCDGA represents a modern or idiosyncratic development. In fact, stripped of octave doublings, it is simply a cello tuned in fifths: C G D A. Carthy himself has said as much. This tuning redistributes violin family pitch relations across the fingerboard in a way that is physically and musically workable. Cellos are first recorded as having been tuned to these pitches as far back as 1532 (Hans Gerle: Musica Teutsch), although England tuned them down to Bb F C G after the French manner till about 1725. One could speculate on the orthography of regional pitch pre standardisation.
Importantly, such tuning systems minimise temperamental problems inherent in thirds on fretted instruments, that is, the tempered thirds that fight against the natural thirds of the harmonic series.
For me, what CGCDGA offers is structural clarity. It allows for two diatonic string pairs rather than one, giving the player greater melodic opportunity across the neck and more freedom to move non linearly without forcing the music back into functional chord shapes. It also allows for effortless transcription of music arranged for diatonic instruments such as the anglo concertina and the melodeon or button accordion. This is why it works so well for Morris tunes.
There are, of course, practical considerations. The first string has been tuned down a long way from its intended pitch of E. As a result it is comparatively slack, bends easily under the finger, and produces lower volume than the rest of the set. You can just about live with this on a standard 13–56 set, but once the tuning becomes a working language rather than a temporary experiment, string choice starts to matter. A heavier top string, or a custom gauge set, restores balance and allows the tuning to behave consistently across the instrument.
While on the subject of modal tunings, it is also worth noting Nic Jones’ use of CGCGCD, most famously on Canadee I O. Again, this tuning sits very close to double C banjo tuning. Both establish C as a tonal centre, reinforce it through octave doubling, and avoid the third entirely. The additional low C deepens the drone field rather than altering the harmonic logic. What changes is weight and resonance, not function.
Taken together, this history suggests not that these tunings are novel or obfuscational, but that they are accessible in the deepest sense. Players across different instruments and generations keep arriving at the same solutions because they solve recurring musical and physical problems in a reliable way. Their survival is not a matter of novelty or difficulty. It is the result of utility, logical structure, and ease of use over time.
One might reasonably ask where this line of thinking leads.
I once spoke with Martin Carthy at a festival where I was showing some of the instruments I build. He remarked, quite matter of factly, that “the problem with CGCDGA is that the top strings sound a lot lower than EADGBE. So it pushes you up the dusty end.” What he was pointing to was not tone but range. The internal logic of the tuning is strong, but it compresses the upper register. You gain coherence and structure at the expense of range.
If one accepts the logic of these tunings as rooted in fifths, octaves, and the avoidance of thirds, then the next step is not to abandon the system but to extend it. We already have the D on the third string functioning as an internal octave and pivot point. Following the same pattern of root, octave, and ninth, and continuing around the cycle of fifths, it is not unreasonable to ask why that structure should stop at six strings.
An eight string instrument tuned CGCDGADE would extend the existing logic rather than inventing a new one. This idea restores upper range without compromising the modal clarity that makes the system useful in the first place. In that sense, it is not an innovation so much as an accommodation. The structure remains. The compass widens.
Whether or not such instruments become common is beside the point. What matters is that the internal reasoning remains consistent. These tunings continue to suggest their own developments because they are built on principles that are stable, adaptable, and musically legible. Tradition, in this sense, is not fixed. It is expandable.
And yes, there is one currently part built on my bench.