This tuning, named Open C6/Bb, presents a rich and somewhat dark sonic landscape. It features a robust low end anchored by C, with higher strings introducing intriguing harmonic and dissonant possibilities. The original intent, as described, was to achieve a sound akin to 'Drab Majesty whole step down,' suggesting a desire for atmospheric, perhaps melancholic or heavy, textures suitable for exploring new scales and chord voicings.

Verbal Analysis

The core of this tuning is a powerful C on the lowest strings, establishing a solid fundamental. As you move up, the inclusion of A and A# (enharmonically Bb) creates a complex harmonic environment. The minor seventh (Bb) lends a bluesy or modern rock flavor, while the major sixth (A) adds a sense of richness and melancholy, often associated with sophisticated harmonies. The tight interval between A and A# on adjacent higher strings offers a unique tension, ripe for expressive lead lines or subtle harmonic shifts. Overall, it's a tuning that encourages deep, resonant chords and melodic explorations within a slightly somber or expansive tonal palette, allowing for both powerful open-string chords and nuanced single-note work.

Technical Analysis & Chords

The open strings are C2 G2 C3 A3 A#4 (Bb4) C4. Here's a breakdown of the musical structure and potential:

• Open Chord: Strumming all open strings yields a complex voicing of a C chord. The lowest three strings (C2 G2 C3) form a strong C5 power chord. Including the A3 (3rd string) adds a major sixth, moving towards a C6 (without the 3rd, E). Further incorporating the A#4 (Bb4) from the 2nd string introduces a minor seventh, creating a voiceless C6(b7) or C13(no 3rd, no 11th). This blend of major sixth and minor seventh offers unique harmonic possibilities without needing to fret, providing a rich, open, and slightly dissonant sound.
• Power Chords: By barring the 6th, 5th, 4th, and 1st strings at any given fret, you can easily achieve strong power chords (root-fifth-octave) due to the C-G-C-C interval structure across these strings. For instance, barring at the 1st fret (F#) will yield a C#5 power chord (C#-G#-C#-C#).
• Extended Voicings & Dissonance: The unique intervals, particularly the minor second between the 3rd string (A3) and 2nd string (A#4/Bb4), make it conducive to creating interesting clusters and extended chords with minimal finger movement. These adjacent dissonances can be easily resolved or sustained for atmospheric effects, offering a modern harmonic flavor.
• Melodic Potential: The wide range from C2 to C4 (two octaves) coupled with the interesting internal intervals provides a rich canvas for melodic lines, especially those that capitalize on the major sixth and minor seventh for expressive and modal playing.

Special Considerations for Tuning

Given the significant changes from standard tuning, it's crucial to consider string tension for optimal playability and tone. The 6th and 1st strings are tuned down 4 semitones from E, and the 3rd string is tuned up 2 semitones from G. For the most comfortable playability and optimal tone, particularly on the heavily down-tuned 6th and 1st strings, using a slightly heavier string gauge is highly recommended to prevent floppiness and maintain proper intonation. For the 3rd string, while not exceeding the critical threshold of 4 semitones up, increased tension is present, so tune carefully to avoid string breakage and ensure neck stability.

Open String Notes:

• 6th String (low E): C2
• 5th String (A): G2
• 4th String (D): C3
• 3rd String (G): A3
• 2nd String (B): A#4 (Bb4)
• 1st String (high E): C4

How to Tune:

• 6th String (E Standard): Tune down 4 semitones to C2.
  Recommendation: Tuning down 4 semitones is significant; a heavier gauge string is advised for optimal tension and tone.
• 5th String (A Standard): Tune down 2 semitones to G2.
• 4th String (D Standard): Tune down 2 semitones to C3.
• 3rd String (G Standard): Tune up 2 semitones to A3.
  Caution: Tuning up 2 semitones increases string tension; proceed carefully to avoid string breakage.
• 2nd String (B Standard): Tune down 1 semitone to A#4 (Bb4).
• 1st String (E Standard): Tune down 4 semitones to C4.
  Recommendation: Tuning down 4 semitones is significant; a heavier gauge string is advised for optimal tension and tone.