scale
Fretboard diagram
A ionian scale — chords and intervals
The harmonized A ionian scale produces the same chord family as the major scale, forming the reference point for all diatonic harmony. Every chord built from this mode occupies a clear functional role: tonic, subdominant, or dominant. The diatonic chords of A ionian are AMaj7, Bm7, C#m7, DMaj7, E7, F#m7, G#m7b5. The I-vi-IV-V turnaround is a classic pop foundation, while the I-iii-vi-ii-V chain creates elegant descending-fifth motion ideal for standards and ballads. Commonly used in Pop, Classical, Folk, Country. Notable players include The Beatles, Bob Dylan, James Taylor.
The A ionian scale has the following degrees: 1 2 3 4 5 6 7.
Intervals: W-W-H-W-W-W-H.
Diatonic chords: AMaj7, Bm7, C#m7, DMaj7, E7, F#m7, G#m7b5.
| Degrees | Chord |
|---|---|
| I | AMaj7 |
| ii | Bm7 |
| iii | C#m7 |
| IV | DMaj7 |
| V | E7 |
| vi | F#m7 |
| vii° | G#m7b5 |
Degree-by-Degree Analysis
The I chord (AMaj7) is the tonic — the gravitational center of the key. The ii chord (Bm7) is the minor subdominant, commonly used to approach the V chord. The iii chord (C#m7) functions as a substitute for the I or vi. The IV chord (DMaj7) is the subdominant — it adds motion and moderate tension. The V chord (E7) is the dominant — it creates the strongest tension that wants to resolve to the I. The vi chord (F#m7) is the relative minor — it brings emotional color and depth. The vii° chord (G#m7b5) is the diminished — the most tense, rarely used alone, usually leading to the I.
This page focuses on the harmonic content — the chords built from each degree of the A ionian scale. For fretboard patterns and fingering guides, see the scale page.
Use the interactive harmonizer above to explore triads, seventh chords, and chord voicings for composing with the A ionian scale on guitar.
ionian is the 1st mode of the Major scale. View A Major scale
Related Scales
How to Use This Scale
Use over Maj7, Maj9, major triads. The default safe choice for any major-key context.