Originally Posted by: CW14The augmented 4th mode of the G# harmonic major scale?

Ok. Here is the Harmonic Major Scale In the key of G#/Ab.
Ab-Bb-C-Db-Eb-E-G-Ab
The notes in darker letters are the perfect intervals, and those are the ones that you normally sharp to get an augmented. Or you can sharp a major to get an augmented, but none of those correspond to my progression.
So if you play the augmented fourth of the G#/Ab Harmonic Major, you would be playing "D".
So it`s not the augmented fourth of the G# harmonic Major.