Dan Koncelik wrote:E7 (L-H E,B,D,G#, B,E)—different from any of the 7th tunings listed in this thread.
In music of that time there seemed to be a (sudden) need for it. I wish I knew why.
I recommend highly Guy Cundell's thesis and his other great academic work and transcriptions for anyone interested in the evolution of tunings in the 30s.
If I recall correctly, he gets into the need at the time for new tunings that could better reflect the growing jazz repertoire and harmony of the time.
I like that E7th you mentioned quite a bit, it's cool not to have the root in the middle, similar to many of the 8 string E13th tunings.
I mentioned this in another thread recently: Dick McIntire's Hot Licks Folio has some great tabs in that E7th beginning on, I believe, page 9:
https://www.yumpu.com/xx/document/view/ ... icks-folio
In the picture you posted Rey is playing a double neck, and the front neck has 7 or 8 strings.
Who knows how he extended the tuning! I'm guessing the method does not mention it.
Mentioned above by David M. Brown, my favorite, and maybe the most advanced 6th string tuning of that era (before C6th and 8 stringers took over) was the Hawaiian E13th(High to low):
E C# G# E D B
In a similar vein to Rey's thoughts about E7th, you may find these comments by Eddie Alkire on the E13th interesting.
From some early instructional material, perhaps circa 1941-46:
"This famous variation of the "EHA Trio Tuning" [Anyone know what this is? Maybe an early predecessor to his Eharp tuning?] is most useful for 6 string guitars.
It is the tuning which nearly all professional and advanced players eventually adopt and feature.
This latest most modern tuning combines many of the good features of all tunings.
Five of the strings (65431) correspond with E 7th Tuning.
Four of the strings (4321) correspond with C# Minor Tuning.
Three of the strings (421) correspond with A Major Tuning.
Thus the range of Harmonics is considerably greater.
Such Frequently used chords as Minor, Minor added 6th, Major added 6th, Dom. 13th, Dom. 9th, Dom 7th, Dom. 7th aug. are playable in the E 13th Tuning.
Whether you are studying as a hobby, for a teaching career, for solo work, or an orchestra job, you will want to concentrate on this Tuning.
Note to E 7th Players: You can easily tune to E 13th.
Sound a harmonic on the G# 3rd string at 5.
Raise the B 2nd string (one tone to C#) until a harmonic at 12 is in unison.
YOU WILL ENJOY THE ADDED HARMONIC POSSIBILITIES!"
On another piece of instructional material dated 1941, 1946:
"E13th is our adaptation of C# minor and E7th tunings. E13th combines the good points of each of these tunings. The strings from 6th to 1st are: BDEG#C#E
This valuable tuning is used by many professionals almost entirely. Many solos are more effective in this tuning and technic work particularly is more convenient."
Food for thought!