Gm

If the piano Gm chord is G B♭ D, and the Gm(add4) is G B♭ C, what is this Chord: G B♭ C D?

If the piano G minor chord is G B♭ D, and the Gm(add4) is G B♭ C, what is this Chord: G B♭ C D?

ChatGPT said:

Let’s walk through it carefully.

1. G minor triad

• G – B♭ – D
  (root, minor 3rd, perfect 5th)
  
  

2. Gm(add4)

• G – B♭ – C
  (root, minor 3rd, added perfect 4th; no 5th)
  
  

3. Your chord: G – B♭ – C – D

• Root = G
  
  

• Minor 3rd = B♭
  
  

• Perfect 4th = C
  
  

• Perfect 5th = D
  
  

4. Naming

This is essentially G minor with both the 4th (C) and the 5th (D) present.

• In chord symbol terms, that’s Gm(add4) (because the 4 is an added tone, not part of a suspended chord) with the 5th included.
  
  

• Sometimes jazz charts write this as Gm(add4) or Gm(add11) (since “11” is the octave of the 4, and implies the 5 is present unless otherwise stated).
  
  

✅ Best name:
Gm(add11) — because it’s G minor with an added 11th (C), and the 5th (D) is intact.

If you want, I can also explain why this voicing could be heard as a completely different chord depending on context — for example, over a C bass it turns into C9sus4. That’s something jazz players love to exploit. Would you like me to go into that?