Okay, so maybe the Tri-Tone 'modulation/transition/tonicization' isn't Dr. Ellie Arroway's 'multi-destination-wormhole-thig-a-ma-jig'....... nah, screw that --- it totally is!
So now, in addition to exploring 7 to 1 in the Major and relative Minor, we can use the same Tri-Tone dyad to 'modulate-to/transition-to/tonicize' closely related keys (within 1 sharp or flat; or the diatonic scale degrees except for 7.
Your brain might not get this -- but your hands and ears will :)
Major: We can use the Tri-Tone to move to & from the following closely 'related keys' to C Major:
C Major (home)
D Minor
E Minor
F Major
G Major
A Minor (relative Minor)
Minor: We can use the Tri-Tone to move to & from the following 'closely related keys' to A Minor:
A Minor (home)
B Minor
C Major (relative Major)
D Minor
E Major
F# Minor (going up)
G Major (going down)
F Major (going down)
Leaving out the scale degree 7 going up in Major and Minor -- your ears will understand why
Scale degree 7 is back in going down Minor -- your ears will understand why
Going up: some dyads will resolve slightly differently than the dyads we've been playing -- your hands will understand why
Going down: you'll find some dyads will resolve slightly differently, and some might not work as well (let your ears decide :)
Root dyads (C & A) are in GREEN
'C Major' tri-tone dyad modulations for each scale degree (5th string exmaple):
'A Minor' tri-tone dyad modulations for each scale degree (3rd string example):