This "twinkly" tuning is designed for bright, open, and often melancholic sounds, commonly found in emo and math rock genres. As described, it's particularly suited for "twinkly emo stuff," offering a unique sonic landscape that departs significantly from standard tuning.

Technical Analysis:

The open strings are tuned to F-A-C-G-B-E (from low to high). This tuning immediately presents a clear F major triad on the lowest three strings (F2-A2-C3), providing a strong harmonic foundation. Moving up, the G3 and B2 create an interesting and wide interval, with the B string tuned down a full octave from its standard pitch. The highest string, E4, remains at its standard pitch.

The F-A-C on the lower strings establishes an F Major tonality, while the G-B-E on the higher strings can be perceived as a G Major triad, albeit with the B an octave lower than typical. This juxtaposition allows for rich harmonic interplay and open, ringing chords characteristic of the "twinkly" sound. The significant drop of the B string to B2 creates expansive and shimmery voicings, perfect for arpeggios and intricate melodic lines.

Open chords that are readily available or suggested by this tuning include:

• An F Major triad (F-A-C) can be played on the 6th, 5th, and 4th strings.
• A G Major triad (G-B-E) can be formed using the 3rd, 2nd, and 1st strings, with the distinctive low B creating a unique voicing.
• The overall open tuning of F-A-C-G-B-E lends itself well to complex extended chords like Fmaj7#11 or Fmaj9sus2, providing a lush palette for ambient and melodic compositions.

How to Tune:

Always tune carefully and gradually. Use standard E-A-D-G-B-E tuning as a reference point for these adjustments:

• 6th String (Low E): Tune up 1 semitone to F2. This is a minor adjustment.
• 5th String (A): Keep as is; no change (0 semitones) to A2.
• 4th String (D): Tune down 2 semitones to C3. This is a moderate adjustment.
• 3rd String (G): Keep as is; no change (0 semitones) to G3.
• 2nd String (B): Tune down 12 semitones to B2. (Warning: Tuning down a full octave will drastically reduce string tension. A much heavier gauge string is strongly advised for this change to ensure playability and prevent excessive buzzing. Consider consulting a luthier for potential neck relief adjustments.)
• 1st String (High E): Keep as is; no change (0 semitones) to E4.

6th String: F2

5th String: A2

4th String: C3

3rd String: G3

2nd String: B2

1st String: E4