Tuning Analysis: Abyssal A & Ascending C

This distinctive guitar tuning, known by its original name "Kayo Dot tuning" and associated with the phrase "Blue Lambency Downward," crafts a unique sonic identity. It plunges into exceptionally low registers while simultaneously building an intriguing harmonic structure on the higher strings.

Verbal Analysis

The most prominent characteristic of this tuning is the dramatic drop of the lowest string to A1. This creates an incredibly deep, resonant, and almost subterranean foundation. Paired with the standard A2 on the fifth string, it establishes a powerful, droning octave on A, perfect for crafting heavy, atmospheric riffs, or a robust bass presence. The middle strings (D3, G3) remain in standard pitch, offering familiar reference points for players. However, the upper register introduces an interesting twist: the second string is tuned up to C4, which, alongside the standard E4 and the G3 below it, forms an open C major triad (G3-C4-E4) across the top three strings. This captivating juxtaposition of an abyssal low A with a bright, open C major chord results in a dynamic range suitable for experimental rock, progressive metal, or avant-garde compositions that seek both massive low-end impact and unexpected harmonic textures.

Technical Analysis

The full tuning sequence, from lowest to highest string, is A1-A2-D3-G3-C4-E4. When played open, the strings collectively form an A minor 7 (add 4th) chord, or an A minor 7 sus4. The octave relationship between the 6th (A1) and 5th (A2) strings provides an exceptionally thick and powerful low end, essentially functioning as a variant of Drop A but with an expanded harmonic richness. This setup simplifies the creation of thick power chords rooted on A. The G3-C4-E4 arrangement on the upper three strings directly presents a C major triad, making C major voicings and arpeggios readily accessible without fretting. This harmonic duality between the dominant low A and the prominent C major triad offers fertile ground for creative voicings and melodic development. While traditional chord shapes will require adaptation, this tuning naturally encourages the discovery of new, compelling harmonic possibilities, particularly those centered around A minor and C major.

Chords & Harmonic Possibilities

• Open Chord: The open tuning A-A-D-G-C-E can be perceived as an A minor 7 (add 4th) or A minor 7 sus4 chord.
• A Power Chords: Easily formed and incredibly powerful using the lowest two strings (A1 and A2), or by barring across the A1, A2, and D3 strings.
• C Major: The open G3-C4-E4 on the top three strings creates a clear C major triad, providing an accessible major tonality.
• A Minor: The open strings inherently lean towards an A minor sound, allowing for rich, complex voicings in this key.
• D Minor/Major: The D3 string serves as a strong root for D-based chords, making them quite approachable within this tuning.
• Unique Voicings: The unconventional intervals, especially the octaves on the lowest strings and the upper C major triad, foster exploration of innovative open string voicings and complex harmonic clusters.

How to Tune

To transform your guitar from standard EADGBe to the "Abyssal A & Ascending C" tuning, please follow these instructions carefully:

• 6th String (Low E): Tune down 7 semitones from E1 to A1. (This is a substantial drop. For optimal string tension, intonation, and to prevent string floppiness, it is highly recommended to use a heavier gauge string if you plan to keep this tuning long-term.)
• 5th String (A): Keep as is; no change (0 semitones). Tune from A2 to A2.
• 4th String (D): Keep as is; no change (0 semitones). Tune from D3 to D3.
• 3rd String (G): Keep as is; no change (0 semitones). Tune from G3 to G3.
• 2nd String (B): Tune up 1 semitone from B3 to C4. (Tuning a string up, even by a small amount, requires caution. Always tune slowly and be mindful of string tension.)
• 1st String (High E): Keep as is; no change (0 semitones). Tune from E4 to E4.

Important Note on String Gauge: For any string movement exceeding 4 semitones (either up or down), as seen with the 6th string in this tuning (-7 semitones), it is strongly advised to consider adjusting your string gauge. Using a heavier gauge for strings tuned down significantly can help maintain proper tension, intonation, and prevent buzzing, while a lighter gauge might be needed for strings tuned up excessively to avoid breakage.

6th String: Tuned to A1 (the lowest note on the guitar).

5th String: Tuned to A2 (an octave higher than the 6th string, providing a rich, droning companion).

4th String: Tuned to D3.

3rd String: Tuned to G3.

2nd String: Tuned to C4 (one semitone higher than standard B3).

1st String: Tuned to E4 (the highest string).