GCD#BD#GB Guitar Tuner
GCD#BD#GB | GCE♭BE♭GB Open Cm(maj7) - Guitar tuning, chords & scales
"Open Cm(maj7)": "Pull up to the midwest emo show with this tuning and everyone will be shocked you know music theory."
Verbal Analysis:
This intriguing tuning, aptly named Open Cm(maj7), immediately conjures a sophisticated yet melancholic sound when strummed open. It provides the full harmonic richness of a C minor major seventh chord without fretting a single note. This gives it a unique, often dramatic or jazzy feel, distinct from more common open tunings. It's excellent for creating ambient textures, complex arpeggios, and can lend itself well to genres like jazz, neo-soul, or the very "midwest emo" vibe suggested by its description. The ability to instantly access such a complex chord opens up creative possibilities for songwriting and improvisation.
Technical Analysis:
This is a 7-string guitar tuning, with the open strings tuned to G1, C2, D3#, B2, D4#, G3, B3 from lowest (7th) to highest (1st) string. When analyzed, these notes collectively form a C minor major seventh chord (Cm(maj7)).
- The root (C) is present on the 6th string (C2).
- The minor third (D# / Eb) is found on the 5th string (D3#) and 3rd string (D4#).
- The perfect fifth (G) is on the 7th string (G1) and 2nd string (G3).
- The major seventh (B) is on the 4th string (B2) and 1st string (B3).
The chord voicing is spread across the seven strings, providing a rich, full sound with a wide intervallic range. Strumming all open strings yields the full Cm(maj7) chord. Due to the inherent chord, barre chords become very easy to form; simply barring across any fret will produce the corresponding minor major seventh chord (e.g., barring the 1st fret yields C#m(maj7), 3rd fret yields Em(maj7), etc.). This makes transposition straightforward and offers a solid harmonic foundation for lead lines and chord melodies.
Tuning Notes:
- String 7 (Lowest): G1
- String 6: C2
- String 5: D3#
- String 4: B2
- String 3: D4#
- String 2: G3
- String 1 (Highest): B3
How to Tune:
To achieve the Open Cm(maj7) tuning, follow these string adjustments. Please note that significant changes (more than 4 semitones up or down) may require a different string gauge to maintain optimal tension and prevent string breakage or intonation issues.
- String 7: Tune down 4 semitones.
- String 6: Tune down 4 semitones.
- String 5: Tune down 6 semitones. A different gauge string is advised for this significant drop.
- String 4: Tune down 3 semitones.
- String 3: Tune down 4 semitones.
- String 2: Tune down 4 semitones.
- String 1: Tune down 5 semitones. A different gauge string is advised for this significant drop.
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Capos for GCD#BD#GB
| Capo | Tuning | Name |
|---|---|---|
| 0 | GCD#BD#GB | Open Cm(maj7) |
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Tuning Map
- Fret
- S7
- S6
- S5
- S4
- S3
- S2
- S1
- -13
- A#
- D#
- G#
- C#
- F#
- A#
- D#
- -12
- B
- E
- A
- D
- G
- B
- E
- -11
- C
- F
- A#
- D#
- G#
- C
- F
- -10
- C#
- F#
- B
- E
- A
- C#
- F#
- -9
- D
- G
- C
- F
- A#
- D
- G
- -8
- D#
- G#
- C#
- F#
- B
- D#
- G#
- -7
- E
- A
- D
- G
- C
- E
- A
- -6
- F
- A#
- D#
- G#
- C#
- F
- A#
- -5
- F#
- B
- E
- A
- D
- F#
- B
- -4
- G
- C
- F
- A#
- D#
- G
- C
- -3
- G#
- C#
- F#
- B
- E
- G#
- C#
- -2
- A
- D
- G
- C
- F
- A
- D
- -1
- A#
- D#
- G#
- C#
- F#
- A#
- D#
- 0
- B
- E
- A
- D
- G
- B
- E
- 1
- C
- F
- A#
- D#
- G#
- C
- F
- 2
- C#
- F#
- B
- E
- A
- C#
- F#
- 3
- D
- G
- C
- F
- A#
- D
- G
- 4
- D#
- G#
- C#
- F#
- B
- D#
- G#
- 5
- E
- A
- D
- G
- C
- E
- A
- 6
- F
- A#
- D#
- G#
- C#
- F
- A#
- 7
- F#
- B
- E
- A
- D
- F#
- B
- -4
- -4
- -6
- -3
- -4
- -4
- -5
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