The Eclipse Tesseract Tuning is a deep and resonant 7-string guitar tuning designed for powerful, expansive soundscapes. With multiple strings tuned to G# and D#, it offers a solid, dark foundation, while the recurring C# adds a sharp, haunting edge. This tuning is particularly well-suited for genres requiring massive, atmospheric textures, heavy riffing, or experimental sound design, pushing the boundaries of conventional harmony.

Technical Analysis

This 7-string tuning, from the lowest (7th) string to the highest (1st) string, is set to:

• 7th String: G2#
• 6th String: D3#
• 5th String: G3#
• 4th String: C4#
• 3rd String: D4#
• 2nd String: G4#
• 1st String: C5#

Observing the intervals between the open strings:

• G2# to D3# (7th to 6th string): Perfect 5th (7 semitones)
• D3# to G3# (6th to 5th string): Perfect 4th (5 semitones)
• G3# to C4# (5th to 4th string): Perfect 4th (5 semitones)
• C4# to D4# (4th to 3rd string): Major 2nd (2 semitones)
• D4# to G4# (3rd to 2nd string): Perfect 4th (5 semitones)
• G4# to C5# (2nd to 1st string): Perfect 4th (5 semitones)

Open Chord Possibilities

Strumming all open strings creates a powerful and resonant G#sus4 chord. The notes G#, D#, and C# are present across multiple octaves, providing a full and dense voicing. This open voicing has a rich, dark quality, perfect for impactful intros or sustained drones.

• The repeated G# and D# notes across octaves make it easy to form expansive G#5 power chords or D#5 power chords by muting specific strings.
• The tight Major 2nd interval between the 4th (C#4) and 3rd (D#4) strings offers opportunities for quick, dissonant melodic phrases or close-voiced harmonies that can be used to create tension before resolving.
• Due to the consistent P4 and P5 intervals, moving open chords up the neck by barring across frets will maintain this powerful sus4-like structure, allowing for easy transposition of complex, full-sounding chords. For example, barring all strings at the 1st fret would yield an Asus4 chord (A E A D E A D).
• The overall sonic character leans towards minor or suspended tonalities, making it an excellent choice for evocative and heavy musical compositions.

The strings of your 7-string guitar should be tuned to the following notes, from the thickest (7th) to the thinnest (1st) string:

• 7th String: G2#
• 6th String: D3#
• 5th String: G3#
• 4th String: C4#
• 3rd String: D4#
• 2nd String: G4#
• 1st String: C5#

How to Tune

To achieve the Eclipse Tesseract Tuning, follow these adjustments for each string:

• 7th String: Tune down 3 semitones to G2#.
• 6th String: Tune down 1 semitone to D3#.
• 5th String: Tune down 1 semitone to G3#.
• 4th String: Tune down 1 semitone to C4#.
• 3rd String: Tune down 4 semitones to D4#. (Caution: Tuning down 4 semitones is a significant adjustment; consider using a heavier gauge string for optimal tension and tone to prevent floppiness or intonation issues.)
• 2nd String: Tune down 3 semitones to G4#.
• 1st String: Tune down 3 semitones to C5#.