The CG#C#F#A#D# Tuning is a unique and deeply resonant tuning for the guitar, presenting a landscape of rich, open harmonies. While the provided description suggests a derivation from D#/Eb standard with a lowered sixth string, the specific open notes present a distinct and highly individualized soundscape.

Technical Analysis:

The open strings of this tuning are as follows:

• 6th String (Low E equivalent): C2
• 5th String (A equivalent): G#3
• 4th String (D equivalent): C4#
• 3rd String (G equivalent): F4#
• 2nd String (B equivalent): A4#
• 1st String (High E equivalent): D5#

This tuning features several striking intervals. Notably, the interval between the 6th string (C2) and the 5th string (G#3) is an augmented fifth spanning more than an octave (a total of 20 semitones from C2 to G#3), creating a significant gap in the lower register. Subsequent intervals are:

• 5th to 4th string (G#3 to C4#): Perfect Fourth (5 semitones)
• 4th to 3rd string (C4# to F4#): Perfect Fourth (5 semitones)
• 3rd to 2nd string (F4# to A4#): Major Third (4 semitones)
• 2nd to 1st string (A4# to D5#): Perfect Fourth (5 semitones)

The presence of C#, F#, A#, and D# in the upper strings, combined with the low C, offers interesting harmonic possibilities. The open strings C#, F#, A# form a C# major triad (inverted). Similarly, D#, G#, A# (from string 1, 5, 2) form a D# major triad. This suggests potential for rich, ringing major chords and open voicings, particularly around C# major and D# major tonalities, even with the unusual low C root.

How to Tune:

To achieve the CG#C#F#A#D# tuning, follow these precise string adjustments. While semitone movements are provided, ensure you tune to the exact target notes listed below. Please exercise caution when making significant tuning changes.

• 6th String (Low E): Tune down 4 semitones to C2. Caution: Tuning down 4 semitones is a significant change. A different gauge string may be advisable for optimal tension and tone.
• 5th String (A): Tune down 1 semitone to G#3.
• 4th String (D): Tune down 1 semitone to C4#.
• 3rd String (G): Tune down 1 semitone to F4#.
• 2nd String (B): Tune down 1 semitone to A4#.
• 1st String (High E): Tune down 1 semitone to D5#.

Note: When implementing the specified semitone movements from a typical E standard (EADGBe) tuning, you may find that strings 1-5 require an octave adjustment to reach the exact target notes (G#3, C4#, F4#, A4#, D5#). Always prioritize tuning to the precise target note to achieve this tuning correctly.