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Catching Up II...

   The Key of Gb uses the notes Gb, Ab, Bb, Cb, Db, Eb, and F and is also known as the (Key of Eb minor), The term 'enharmonic' often refers to the alias name for this key (Key of F#), Any of the letters used (ABCDEFG) can be flat (Ab,Bb,Cb,Db,Eb,Fb,Gb) or sharp (A#,B#,C#,D#,E#,F#,G#), This however is one of the flat keys...

   NOTE: take notice that this is the only key that uses 'Cb', Take double notice that 'Cb' is 'B'...

   If you don't know any of the other keys then you may want to start with the key of C, Every key has an opening pattern and each one will look oddly different then the others...

Key of Gb...

   There are about four 'box patterns' that we use for all twelve keys (when we can) and they will always interlock in the same order, These four patterns will be found in every key...

Key of Gb...

Key of Gb...

Key of Gb...

Key of Gb...

   Once you master these four 'box patterns' then you can go on to the next step which is stringing them together, Each of the four patterns shown above overlap with the previous or next pattern, Note that it's this way for all twelve keys...

   Here are the basic chords for the Key of Gb, this shows the Natural Chord Progression that they follow based on the tones starting from the key note...
(a 13th chord is commonly referred to as a 6th chord - they are identical)

Chord name --------------------- Notes used

Gb major ------------------------- Gb Bb Db
Gb major 3rd -------------------- Gb Bb ..
Gb 5 ------------------------------- Gb .. Db

Gb major 7th --------------------- Gb Bb Db + F 
Gb major add9 ------------------ Gb Bb Db + F + Ab
Gb sus7 -------------------------- Gb .. Db + F 

Gb major 9th -------------------- Gb Bb Db + Ab
Gb sus2 -------------------------- Gb .. Db + Ab  ------- (Db major sus4)

Gb major 11th ------------------- Gb Bb Db + Cb
Gb sus4 --------------------------- Gb .. Db + Cb

Gb major 6th/13th ------------- Gb Bb Db + Eb
Gb sus6 --------------------------- Gb .. Db + Eb

Compare the Gb major 13th to the Eb minor 7th below

Eb minor -------------------------- Eb Gb Bb
Eb minor 3rd --------------------- Eb Gb
Eb 5 -------------------------------- Eb .. Bb

Eb minor 7th --------------------- Eb Gb Bb + Db
Eb minor add9 ------------------- Eb Gb Bb + Db + F
Eb sus7 ---------------------------- Eb .. Bb + Db

Eb minor 9th ---------------------- Eb Gb Bb + F
Eb sus2 ---------------------------- Eb .. Bb + F  ------- (Bb minor sus4)

Eb minor 11th --------------------- Eb Gb Bb + Ab
Eb sus4 ---------------------------- Eb .. Bb + Ab

Eb minor 6th/13th -------------- Eb Gb Bb + Cb
Eb sus6 ---------------------------- Eb .. Bb + Cb

Compare the Eb minor 13th to Cb major 7th below

Cb major ---------------------------- Cb Eb Gb
Cb major 3rd ---------------------- Cb Eb ..
Cb 5 --------------------------------- Cb .. Gb

Cb major 7th ---------------------- Cb Eb Gb + Bb
Cb major add9 -------------------- Cb Eb Gb + Bb + Db
Cb sus7 ---------------------------- Cb .. Gb + Bb

Cb major 9th ----------------------- Cb Eb Gb + Db
Cb sus2 ---------------------------- Cb .. Gb + Db  ------- (Gb sus4)

Cb major 11th ---------------------- Cb Eb Gb + F
Cb sus4 ---------------------------- Cb .. Gb + F        ------- (Extended Tritonics)...

Cb major 6th/13th -------------- Cb Eb Gb + Ab
Cb sus6 ---------------------------- Cb .. Gb + Ab

Compare the Cb major 13th to the Ab minor 7th below

Ab minor --------------------------- Ab Cb Eb
Ab minor 3rd ---------------------- Ab Cb
Ab 5 -------------------------------- Ab .. Eb

Ab minor 7th ---------------------- Ab Cb Eb + Gb
Ab minor add9 -------------------- Ab Cb Eb + Gb + Bb
Ab sus7 ---------------------------- Ab .. Eb + Gb

Ab minor 9th ---------------------- Ab Cb Eb + Bb
Ab sus2 ---------------------------- Ab .. Eb + Bb  ------- (Eb minor sus4)

Ab minor 11th -------------------- Ab Cb Eb + Db
Ab sus4 ---------------------------- Ab .. Eb + Db

Ab minor 6th/13th --------------- Ab Cb Eb + F
Ab sus7 ---------------------------- Ab .. Eb + F

Compare the Ab minor 13th to the F diminished 7th below

F diminished ---------------------- F Ab Cb
F minor 3rd ----------------------- F Ab ..
F (b5) ------------------------------ F .. Cb        ------- (Tritonics)...

F diminished 7th ----------------- F Ab Cb + Eb
F diminished add9 --------------- F Ab Cb + Eb + Gb
F sus7 ------------------------------ F .. Cb + Eb      ------- (Extended Tritonics)...

F diminished 9th ----------------- F Ab Cb + Gb
F dim. sus7 ----------------------- F .. Cb + Gb       ------- (Cb sus4)...

F diminished 11th ----------------- F Ab Cb + Bb
F dim. sus4 ------------------------- F .. Cb + Bb      ------- (Extended Tritonics)...

F diminished 6th/13th -------- F Ab Cb + Db

Compare the F diminished 13th to the Db major 7th below

Db major ------------------------------ Db F Ab
Db major 3rd ------------------------- Db F ..
Db 5 ----------------------------------- Db .. Ab

Db major 7th ------------------------- Db F Ab + Cb
Db major add9 ----------------------- Db F Ab + Cb + Eb
Db sus7 ------------------------------- Db .. Ab + Cb

Db major 9th ------------------------- Db F Ab + Eb
Db sus2 ------------------------------- Db .. Ab + Eb  ------- (Ab minor sus4)

Db major 11th ------------------------ Db F Ab + Gb
Db sus4 ------------------------------- Db .. Ab + Gb

Db major 6th/13th  ----------------- Db F Ab + Bb
Db sus6  ------------------------------- Db .. Ab + Bb

Compare the Db major 13th to the Bb minor 7th below

Bb minor ------------------------------ Bb Db F
Bb minor 3rd ------------------------- Bb Db ..
Bb 5 ------------------------------------ Bb .. F

Bb minor 7th -------------------------- Bb Db F + Ab
Bb minor add9 ----------------------- Bb Db F + Ab + Cb
Bb sus7 -------------------------------- Bb .. F + Ab

Bb minor 9th ------------------------- Bb Db F + Cb
Bb sus2 ------------------------------- Bb .. F + Cb  ------- (F dim. sus4)

Bb minor 11th ------------------------- Bb Db F + Eb
Bb sus4 -------------------------------- Bb ... F + Eb

Bb minor 6th/13th ----------------- Bb Db F + Gb
Bb sus6 ------------------------------- Bb .. F + Gb

Compare the Bb minor 13th to the Gb major 7th at the very top

    * The 13th chord is most often named a 6th chord (Bb minor 6th = Bb minor 13th) the chord building structure indicates that a 6th chord, contrary to what others believe, should be named 13th. If the naming of this extension as a 6th is the proper way then why isn't there a Bb minor 8th, Bb minor 10th, and Bb minor 12th or Bb minor 14th... (See our 14th chords lesson)...

   For more information on the 13th chords, check out our lesson on 6th chords and our lesson on Chord Building You are currently looking at the Key of Gb, the best keys to change to from here are the Key of B and the key of Db).