All fourths tuning¶
A regular guitar tuning in which every adjacent string pair is tuned a perfect fourth apart, replacing standard tuning's single major-third interval.
Core Idea¶
All fourths tuning is a regular guitar tuning in which every adjacent string pair is tuned a perfect fourth apart, replacing standard tuning's single major-third interval.
All-fourths tuning sets every adjacent guitar string a perfect fourth apart, commonly E–A–D–G–C–F on six strings. It removes standard tuning's major-third break between G and B, making interval and scale shapes translationally regular across string pairs while altering familiar chord voicings, range, and open-string repertoire.
Its operative boundary is not supplied by the name alone. Preserve this identity: A regular guitar tuning in which every adjacent string pair is tuned a perfect fourth apart, replacing standard tuning's single major-third interval.
Scope of Application¶
The abstraction recurs literally within guitars and related fretted instruments whose players adopt a uniform fourth interval for fretboard regularity. The following habitats preserve the same recognition machinery; they are not invitations to extend the name metaphorically.
- Jazz improvisation. one fingering pattern transposes consistently across strings.
- Two-handed tapping. symmetric layouts aid mirrored and independent shapes.
- Scale practice. interval maps do not cross a major-third discontinuity.
- Chord vocabulary. voicings are relearned under the uniform grid.
- Extended-range instruments. the same recurrence can extend over more strings.
Clarity¶
Report pitches from low to high, sounding versus written octave, number of strings, reference pitch, and temperament. The defining property is the interval sequence, so transposed variants still qualify. Do not infer that all fingerings become easy: wide multi-string chord shapes may become harder.
A practical identification audit begins with the typed roles rather than the title: establish the ordered strings, verify the reference pitch, then test the remaining conditions and exclusions.
Manages Complexity¶
The tuning trades compatibility with standard chord shapes for a uniform two-dimensional pitch grid. One set of interval patterns can be translated across every adjacent string pair, reducing exception memorization.
The compression remains accountable because each simplification has a named failure condition. Disagreement can be localized to a missing role, an invalid assumption, an ambiguous measurement, or a neighboring abstraction instead of being hidden inside an unanalyzed label.
Abstract Reasoning¶
R1. Choose the lowest open-string pitch and intended register. R2. Tune every next string exactly one perfect fourth above the preceding string. R3. Verify the five-semitone interval for each adjacent pair. R4. Remap scale, interval, octave, and chord shapes under the uniform grid. R5. Evaluate string tension, range, voicing accessibility, and repertoire compatibility.
Knowledge Transfer¶
The identity transfers literally across fretted string instruments with a uniform adjacent-fourth sequence. Symmetry and constraint are parents; any regular layout or quartal music is not all-fourths tuning.
The transfer boundary is explicit: DOMAIN-SPECIFIC PASS / PRIME FAIL: The tuning recurs across guitars, chord and scale fingerings, transpositions, and performance contexts. Literal recognition retains the specialist vocabulary and validity conditions of guitar tuning and music performance; outside that setting only broader parent operations transfer.
Relationships to Other Abstractions¶
Current abstraction All fourths tuning Domain-specific
Parents (2) — more general patterns this builds on
-
All fourths tuning is a kind of Constraint Prime
Constraint (
prime:constraint). -
All fourths tuning is a kind of Symmetry Prime
Symmetry (
prime:symmetry).
Hierarchy paths (2) — routes to 2 parentless roots
- All fourths tuning → Constraint
- All fourths tuning → Symmetry
Neighborhood in Abstraction Space¶
All fourths tuning sits in a sparse region of the domain-specific corpus (78th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.
Family — Unclustered & Miscellaneous (1565 abstractions)
Nearest neighbors
- Consonance — 0.84
- Pedal Point — 0.83
- Tonality — 0.83
- Atonality — 0.83
- Timbre — 0.82
Computed from structural-signature embeddings · 2026-09-08