This intriguing tuning, aptly named "Open C#", presents an experimental and distinctive sound profile, originating from its creator's exploration, described as "something I was playing around." While carrying the moniker "Open C#", it strategically diverges from more conventional Open C# tunings to offer a truly unique harmonic landscape.

Technically, the tuning is configured as C#3 - G#3 - C#4 - E3 - C#5 - D#5 from the lowest (6th) to the highest (1st) strings. This particular arrangement yields a complex yet resonant open chord voicing. The presence of multiple C# notes (on strings 6, 4, and 2) alongside a G# (on string 5) firmly establishes a strong C# root and fifth foundation, lending a powerful, resonant quality to the tuning. However, the inclusion of an E (a minor third relative to C#, on string 3) and a D# (a major second/ninth, on string 1) introduces a sophisticated harmonic tension that prevents a simple major or minor classification.

Open Chords and Possibilities:

• Open Strum: Strumming all open strings produces a rich C#m(add9) chord (C# minor with an added major ninth). This creates a dark, contemplative, and slightly ethereal feel, perfect for genres like progressive rock, metal, ambient music, or cinematic scores. The strong root and fifth presence allows for significant sustain and inherent power.
• Power Chords: Due to the C#-G#-C# intervals on the lower strings (6th, 5th, 4th), you can effortlessly achieve powerful C#5 chords by simply barring or focusing on these strings. These robust power chords can be easily transposed up the neck for impactful rock and metal riffs. The duplicated roots also mean that simple two-string or three-string power chords are readily available across the fretboard.
• Melodic Opportunities: The distinct and somewhat unusual intervals, particularly the minor third (E) and major ninth (D#) against the prevailing C# root, open up unique avenues for melodic lines and sustained drones. This tuning invites exploration of scales such as C# Phrygian or C# Dorian, which can create exotic and captivating soundscapes.
• Drone Potential: The repeated C# and G# notes throughout the tuning make it an excellent choice for drone-based compositions. Sustained open notes can form a deep, resonant foundation, creating expansive and atmospheric soundscapes that are particularly effective in experimental or ambient contexts.

How to Tune:

To transform your guitar from standard EADGBE tuning to this unique "Open C#" configuration, follow these precise adjustments for each string:

• String 6 (Low E): Tune down 3 semitones from E to C#3.
• String 5 (A): Tune down 1 semitone from A to G#3.
• String 4 (D): Tune down 1 semitone from D to C#4.
• String 3 (G): Tune down 3 semitones from G to E3.
• String 2 (B): Tune up 2 semitones from B to C#5.
• String 1 (High E): Tune down 1 semitone from E to D#5.

All string movements in this tuning are within a safe range of +/- 4 semitones. Therefore, a change in string gauge is generally not required, allowing for comfortable playability with your existing string setup.

String 6 (Low E): C3#

String 5 (A): G3#

String 4 (D): C4#

String 3 (G): E3

String 2 (B): C5#

String 1 (High E): D5#