This is a highly distinctive and deep tuning for the guitar, officially named D#m7#11/Ebm7#11. It deviates significantly from standard tuning, offering a unique sonic landscape characterized by its low 'A' on the lowest string, as noted in its description. This tuning is not for the faint of heart, demanding precision in tuning and potentially different string gauges due to the substantial pitch adjustments.

Technical Analysis & Harmonic Potential

The open notes for this tuning are:

• String 6 (Low E): A1
• String 5 (A): F#3
• String 4 (D): A#3
• String 3 (G): D#4
• String 2 (B): F#4
• String 1 (High E): C#5

Analyzing the open strings, particularly strings 4 through 1 (A#, D#, F#, C#), we find the exact notes of a D# minor 7 chord (D#, F#, A#, C#), but voiced as an inversion (A# is the 5th, D# is the root, F# is the minor 3rd, C# is the minor 7th). This means a powerful D#m7 chord is readily available simply by strumming these four strings open. The presence of these chord tones within easy reach suggests this tuning is expertly crafted for rich minor 7th harmonies.

The full complement of open strings (A, F#, A#, D#, F#, C#), when viewed from an Eb minor perspective (Eb, Gb, Bbb, Db), contains all the notes of an Eb minor 7 chord (D#, F#, A, C#) plus the 5th (A#/Bb) and an additional minor 3rd (F#/Gb). The low A (Bbb) on the 6th string provides a deep, resonant foundation, while its presence alongside the core Eb minor 7 harmony creates unique harmonic tension. While the explicit #11 (Ab) is not present in the open strings, this tuning certainly lends itself to complex minor, jazz, or fusion contexts, where such extensions can be easily implied or added with fretting. It encourages exploration of sophisticated minor 7th and extended voicings, offering a broad palette for creative expression.

How to Tune

This tuning requires significant adjustments from standard tuning. It is crucial to tune carefully and be aware of string tension. For adjustments that exceed 4 semitones (either up or down), considering a different string gauge might be advisable to ensure string integrity and optimal playability.

• String 6 (Low E to A1): Tune down 7 semitones. (Caution: This is a substantial downward adjustment; a heavier gauge string is strongly advised for best performance and to prevent string breakage or intonation issues.)
• String 5 (A to F#3): Tune down 3 semitones.
• String 4 (D to A#3): Tune down 4 semitones.
• String 3 (G to D#4): Tune down 4 semitones.
• String 2 (B to F#4): Tune down 5 semitones. (Caution: This is a substantial downward adjustment; a heavier gauge string is strongly advised for best performance and to prevent string breakage or intonation issues.)
• String 1 (High E to C#5): Tune down 3 semitones.