Why Gb??

Originally Posted by: magicninjaOk let's see here.

C--->Tonic
C#--> Has to be some form of the tonic right like a super tonic or Augmented first?
Db-->Minor second
D--->Major Second
D#-->Augmented second
Eb-->Minor third
E--->Major third
F--->Perfect 4th?
F#--> :confused: augmented again?
Gb-->minor 5th

I guess I need to learn my intervals better.

The formula for a dim chord is I bIII bV, correct?

and the intervals in a Major scale are wwhwwwh. No?

C----> Tonic
C#---> major 7 of II among a few other things
Db----> minor second
D-----> major second
D#----> augmented second
Eb----> minor third
E-----> major third
F-----> perfect fourth
F#----> augmented fourth
Gb----> diminished fifth
G-----> perfect fifth
G#----> augmented fifth
Ab----> minor 6th

Etc etc etc

Originally Posted by: magicninjaI see

So basically the intervals aren't from the tonic but from the previous note.

i.e
--------Minor third------Minor third
Cdim=C------------>Eb------------>Gb

More or less, yeah. But, as always in music, there are multiple ways of doing the same thing.