3. Halving the comma shift

 This is the essential idea in "In Tuningland": by moving Bb a half comma upwards (one unit in my system), we get a setup called Bb+1  







This D-1  from Bb+1 is then falling just in the middle between  D 0 and D-2 in C 0. When you change the manual or patch digitally on a keyboard, the comma shift will always be halved. This is also the case the opposite way. C from C 0 falls in the middle between the C+1 and C-1  in Bb+1
Some tones from Bb+1 end up higher than in C 0 (eg Bb and F) and some lower (eg G and E).
They thus merge into each other in a favorable manner. 

Below you can see where you will find the pure chords, and in which setup the chord is highest in pitch. 




More tables are HERE 

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