Double Bass Chord help

[Kitschead]

I've been trying to transcribe the chords in the Christian Mcbride song "...Or So You Thought". There's just two chords played by the keyboard in the verse which I need help with. If any of you know the tune and know what the chords are that would be great. Otherwise do you know what the best place to start would be in terms of working the chords out?

 

[Fletcher Lanning]

When trying to figure out the changes to a tune I always start by picking out the bass note and then picking out any other notes I can distinctly hear. Even if you can only hear a few different notes, that will often be enough to clue you in the the correct chord.

 

[Bruhman]

Bb mi 13 and Ab mi 13 (right hand is voiced - bottom to top - Ab, C, Db, G, then just drop everything down a whole step for the Abmi.)

 

[Kitschead]

Oh wow. Thanks a lot man!