Help with chords to this song!!??

[TDOT]

I'm am trying to learn the chord progression for this song, it's at the very begining and plays throughout the whole song.

Cassie official girl:
official girl cassie instrumental - YouTube

I started first with the base keys.
F#, G#, A, A, B, D
which sounded like I was spot on

then I found which key I could relate those notes to
Key of AMaj

I want to know the chords to play so I played the given chords in the ek of AMaj:
F#m, G#?, AM, AM, Bm, DM

The question comes from that second chord with the Base Key G#
as per the Major scale it should be G# diminshed, but that doesn't right at all and it's driving me nuts, I tried inversions too and it also sounded off.

Any help would be appreciated, I'm sure it's simple but my theory and ear isn't the greates

 

[bandcoach]

fell into the beginners trap.....

What triads contain G# in them in the key of A????

A-B-C#-D-E-F#-G#-A are the scale tones

triads are

Degree	Type	Tones
I	Major	A-C#-E
ii	Minor	B-D-F#
iii	Minor	C#-E-G#
IV	Major	D-F#-A
V	Major	E-G#-B
vi	Minor	F#-A-C#
viib5	Dim	G#-B-D

So possible triads are
E major
C# minor
G# diminished

because it is G# in the bass the triads are written as

E[sub]/G#[/sub]
C#m[sub]/G#[/sub]
G# dim

Of these three, only the E[sub]/G#[/sub] works as a solution to the given progression

 

[TDOT]

LOL wow thanks band coach, I would say that's a big rookie mistake
I didn't even think outside the box, what a fool, I assumed the chord to be, based on the base note

So what you're saying then is, by determining the base note, you need to take a look at which triads in that key, contain that base note.

I will do that next time for sure
Thanks again,

 

[bandcoach]

yes, bass note is only one indicator of chord type.

Consider for example another one I also did today, where the chord was Ebm/Db - it is Ebm7 , but the bass note is the 7th - it is also very close to another chord Cb/Db (B/C#) (Ebm/D#m shares two notes with Cb/B) and only by comparing possibilities can you come to the conclusion that it is in fact the m7 in third inversion (Ebm/Db)