Dynamic 24-Fret Mapping
Select 6-, 7-, or 8-string presets or configure each string individually. Every fret computes the exact chromatic pitch class across the full 24-fret neck.
Live product
Map chords and scales in any guitar tuning.
A free fretboard visualizer, chord and scale map, and string-setup workbench for 6-, 7-, and 8-string guitars.
Standard chord charts break when you change open strings. AltTuningLab recalculates note positions across 24 frets for drop tunings, open tunings, and custom string sets, combining music theory with physical string tension modeling.
6, 7 & 8
strings supported
24 frets
real-time chromatic map
100% free
no account required
Physics-based
string tension modeling
ATL
AltTuningLab
Fretboard note & chord engine
7-STRING DROP AA NATURAL MINORA MINOR CHORD
NUT
F0
F1
F2
F3
F5
F7
F9
F12
F15
F17
F19
F21
F24
S1E4
E
F
·
G
A
B
·
E
G
A
B
·
E
S2B3
B
C
·
D
E
·
·
B
D
E
·
·
B
S3G3
G
·
A
·
C
D
E
G
·
C
D
E
G
S4D3
D
·
E
F
G
A
B
D
F
G
A
B
D
S5A2
A
·
B
C
D
E
·
A
C
D
E
·
A
S6E2
E
F
·
G
A
B
·
E
G
A
B
·
E
S7A1
A
·
B
C
D
E
·
A
C
D
E
·
A
Tension (Low A1)
17.4 lbs (.064 on 25.5")
Formula Model
T = UW × (2LF)² / 386.4
Runtime
Zero backend / Instant
Capabilities
Built for guitarists who tune beyond standard.
Most guitar tools assume standard E tuning. AltTuningLab recalculates the neck so players can explore lower registers and alternate intervals.
Scale Overlays & Chord Voicings
Overlay Natural Minor, Harmonic Minor, Phrygian Dominant, Lydian, or Mixolydian. Identify root notes, chord tones, and scale degrees, then build and save chord progressions.
String Tension & Gauge Modeling
Calculate physical string tension in pounds using speaking length, pitch frequency, and unit weight. Compare gauge options before restringing.
Tuning Guides & Editorial Data
Deep-dive guides for popular alternate tunings including Drop D, Drop C, 7-String Drop A, and extended-range setups, with live diagrams generated from the same data model.
Engineering & Architecture
How Pineware built AltTuningLab
AltTuningLab combines music theory calculation engines, physical modeling formulas, and high-performance browser rendering. Pineware specified the domain requirements and orchestrated agent implementation from task breakdown to production release.
01
Deterministic client-side music theory
Semitone intervals and chromatic wrapping run in lightweight client-side state without external API dependencies or backend latency.
02
Physical tension equation
Implements T = UW x (2 x L x F)^2 / 386.4 to estimate string tension across plain and wound steel constructions.
03
Mobile-first 24-fret viewport
Optimized horizontal scrolling and responsive fretboard rendering for fast inspection on phones and desktops.
04
Unified content & calculation pipeline
Tuning guides, fretboard figures, and calculator presets share the same version-controlled source data to prevent stale documentation.
Live Application
Explore AltTuningLab
Use the visualizer, check string tensions, or browse tuning guides on alttuninglab.com. Free to use with no account required.