FREE REFERENCE LIBRARY · NO ACCOUNT NEEDED

Music reference

Start with your instrument, find a tuning, and follow the notes into chords and scales. Explore the facts and fretboard diagrams at your own pace—or use them alongside a lesson.

16 instrument presets

Instruments

Stringed-instrument reference configurations with string counts, fret layouts, default tunings, and open-string notes.

Browse instruments

52 tuning definitions

Tunings

Reference tunings for guitar, bass, bowed strings, ukulele, mandolin, banjo, and Chapman Stick, derived from the Tunings music catalog.

Browse tunings

24 chord references

Chords

Common rooted major and minor chord references with notes, symbols, and semitone intervals.

Browse chords

66 scale names · 12 roots

Explore every scale type in the Tunings catalog: major and minor modes, pentatonics, blues, bebop, symmetric scales, and more. Choose a root, compare interval formulas, and see the notes on a free fretboard.

Browse scales

Start with your instrument

Check the string configuration and default notes, then compare compatible tunings.

6-String Guitar 7-String Guitar 8-String Guitar 4-String Bass Mandolin Ukulele (Soprano)All instruments →

Explore an alternate tuning

All tunings →

Drop D

D · A · D · G · B · E

Drop D is a 6-string guitar tuning with open strings D–A–D–G–B–E.

View Drop D reference

Drop C

C · G · C · F · A · D

Drop C is a 6-string guitar tuning with open strings C–G–C–F–A–D.

View Drop C reference

Open G

D · G · D · G · B · D

Open G is a 6-string guitar tuning with open strings D–G–D–G–B–D.

View Open G reference

DADGAD

D · A · D · G · A · D

DADGAD is a 6-string guitar tuning with open strings D–A–D–G–A–D.

View DADGAD reference

Follow a scale into its chords

E Minor contains E · F# · G · A · B · C · D. See the notes on a free fretboard, try 2, 3, or 4 notes per string, then explore the major and minor triads contained in the scale.

C Major D Major E Minor G Major A Minor B Minor

For a five-note starting point, try the E Minor Pentatonic fretboard. Browse all scale diagrams or all chord references.

Build with the same reference data

The public read-only API provides these catalog definitions and relationships as JSON. Custom tunings, translation, saved instruments, and advanced tools are available in the Tunings app.