This unique tuning, aptly named "All Fourths w/Low F," offers a refreshing approach to the guitar, particularly for those exploring F-centric harmonies. It's described as a simple all-fourths tuning with the lowest string tuned up a half-step, which is designed to facilitate open F-spectrum chords (like F, Bb, C) with an easily accessible open bottom string. A key benefit is the ability to play an F major chord without traditional barring, mimicking the ease of playing an E chord in standard tuning, thanks to the highest strings being tuned to C and F.

Technical Analysis

Upon closer inspection of the intervals, this tuning presents a slightly varied structure. Starting from the lowest string (6th string F2 to 5th string A2), the interval is a Major Third (M3), covering 4 semitones. The subsequent intervals, however, consistently maintain a Perfect Fourth (P4), each covering 5 semitones: A2 to D3, D3 to G3, G3 to C4, and C4 to F4. While the name suggests an 'all-fourths' tuning, the initial Major Third interval provides a unique harmonic character at the bass.

The open string notes F-A-D-G-C-F form a rich, resonant sound. This combination can be interpreted as an Fadd9/D or Dsus2/F chord, offering immediate harmonic depth. The presence of F, A, and C across the open strings (F2, A2, C4, F4) inherently provides a strong foundation for F Major chords. As the description highlights, an F Major chord (F-A-F-A-C-F) can be easily formed without a bar by utilizing the open 6th (F), open 5th (A), fretting the 4th string at the 3rd fret (F), the 3rd string at the 2nd fret (A), and keeping the 2nd (C) and 1st (F) strings open. This setup significantly simplifies playing in the key of F and related chords, offering new melodic and harmonic possibilities.

How to Tune

To achieve the 'All Fourths w/Low F' tuning from standard EADGBe, follow these steps:

• 6th String (Low E): Tune up 1 semitone from E to F2.
• 5th String (A): Keep as is; no change (0 semitones) at A2.
• 4th String (D): Keep as is; no change (0 semitones) at D3.
• 3rd String (G): Keep as is; no change (0 semitones) at G3.
• 2nd String (B): Tune up 1 semitone from B to C4.
• 1st String (High E): Tune up 1 semitone from E to F4.

All string adjustments are minor (1 semitone or less), making this tuning safe for standard guitar string gauges and requiring no special considerations.

String 6: F2
String 5: A2
String 4: D3
String 3: G3
String 2: C4
String 1: F4