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MODE BOXES AND BRACKETS, FOR STRING INSTRUMENTS;
Some charts and mechanics involved.
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I am thoroughly enjoying these latest discussions on fretboard mechanics and math. It allows me to learn from others, forces me to recap old dusty concepts, and always learn something new. THANKS A MIL Guys.
Digestive debate among folks that know a subject rather well truely does afford an excellent forum for all with any level of subject knowledge.
But as it looks like the discussion might be wrapping up, allow me to post these things I've been working on all day long. I think graphic display might help. Seems fitting to have some charts and mechanics:
I have made a Spanish Guitar Ionian chart that might help us visualize and refer to in our discussions, along with my
Steel modes / substitution chart and
Spanish Guitar CHORD modes / substitution chart and
Spanish Guitar SCALES mode substitution chart.
I also see an additional avenue of fretted string instrument mechanics we have not touched upon that has all to do with the notes shifting on opposite ends of adjoining mode boxes. That can help meld our several perspectives of Steel and Spanish Geetar boxes and their whys, into one.
AGAIN, For the purpose of comparing Spanish Guitar with Steel guitar modal boxes, ... WE MUST predicate any comparison between Steel and Spanish Guitar on the understanding that a spanish guitar's example fingering MUST remain the same through the boxes, for comparison with a Steels tuning that remains the same as the bar is moved up and down the neck. Otherwise we will be trying to compare the genetic similarities between apples and oranges.
On the new chart, you will notice that there is a different box FOR EACH different spanish fingering of THE SAME SCALE (and thus for each triad therein), just like there is a different same-mode box for every Steel TUNING. BUT;
We can still make some comparisons that will show us the mechanics of notes on fretted strings that make the boxes overlap and share intervals on those overlapping frets ... and what is happening to the shift on the non-shared frets:
You will notice that the spanish Guitar's different fingering boxes for the same mode / scale ALSO OVERLAP FOR THE SAME REASON THAT DIFFERENT MODES DO ON STEEL; Which is a matter of fretted string instrument mechanics, and not from modal mechanics (that I can see). For notes to go upscale on a fretted string instrument with more than one string, they either do so by going up the same string or shifting over to the next higher pitched string. The only differences between Steel and Spanish Guitar in the mechanics of the string shift is the voicings that are being shifted one string over by the new frets added in the new box and the old frets being dropped from the old box.
(sidenote):
(SOMEBODY simply figured out that the 6th note put into the triad in a 6th tuning on Steel, created the simplest math to pull all the notes into a full-scale 2-fret box that had the interval math to morph into all the church modes as it is moved up and down scale. And I am guessing it was likely Jerry Byrd and Chet Atkins working together since their close association in the early '50's and their musical approach and evolution seems congruent in time. That is also about the same time that Miles Davis started drumming on modal simplicity as opposed to Be-Bop mode abstract. Maybe someone here can provide us some more info on the origination of the 6th tuning.)
On Spanish Guitar the boxes are wider only because the intervals between strings in standard tuning are wider than on Steel.
On Steel AND on Spanish Guitar, the notes that are changed from box to box always occur on the unshared fret(s) of the neighbor box, on the opposite end from the common fret(s) between neighbor boxes, ...because the unshared fret is where the notes are being shifted to the next adjoining strings. That is a matter of fretted string instrument mechanics, not of mode math. Those mechanics just happen to meld up with the designed-in notes features of the 6th tuning that falls upon the strings and frets. HOWEVER;
On spanish Guitar, the boxes overlap for different finger positions for the same mode because each adjoining finger position is simply removing two frets from one end of the box and replacing 2 frets on the other end of the box to get the same intervals as they occur in the next finger position box's unshared frets shifted 1 string over. Again, to raise notes you either have to go up the string or shift to the next higher fret!
Now, as Rick and I have proposed: If you move any ONE spanish scale/chord finger pattern ... or any Steel bar position ... up or down the fretboard to make the mode therein change, then the scale/chord structure represented by either the fingered or steel-barred box, will go downscale to match the mode steps as they move upscale; WHETHER IT BE STEEL OR SPANISH GUITAR.
It is axiom: To change the mental identification of a given note grouping's mode to another mode, the original grouping has to move intact in the OPPOSITE direction up/down scale from the direction along the mode step sequence that root will become in the new change; Regardless of what instrument it is; ....well, almost all instruments anyway; I'd hate to have to chart out a Theramin!
Huh?
ALOHA,
DT~
<FONT SIZE=1 COLOR="#8e236b"><p align=CENTER>[This message was edited by Denny Turner on 25 May 2003 at 04:36 AM.]</p></FONT>