Here is a lesson about the “Rondeña” tuning
http://www.rdiaz.org/rdvideo124.html
6th on D
3 th on F#
The rest of the strings are same as standard tuning.
……………….
Key is F#m
F#m / Im
E7 / bVII7
D7 / bVI7
C#7b9 / V7b9
Enjoy!
your friend
Ruben Diaz
http://www.rdiaz.org/rdfoto4.html