What is Open A tuning?

Open A tuning is E-A-E-A-C#-E (low to high). Strumming all strings produces an A major chord. It's structurally the same as Open G but one whole step higher.

Is Open A the same as Open G with a capo?

Yes, musically they are identical — Open G with a capo at fret 2 gives you the same pitches as Open A. Many players use this approach. Without a capo, Open A has higher string tension which some slide players prefer for better control.

What scales work in Open A?

The A major pentatonic and A blues scale are natural choices. A Mixolydian gives a bluesy feel, and the A major scale works for country and folk styles.

A# Lydian Dominant Guitar Scale

Guitar scale in Open A tuning — fretboard diagram

Tuning

Frets

A# Lydian Dominant in Open A — Notes and Intervals

The A# Lydian Dominant scale, also known as the Acoustic scale, sounds bright, quirky, and dominant all at once. On Guitar, its notes are A#, C, D, E, F, G, G#. It is widely used in jazz and animation music to solo over dominant chords that do not resolve in the traditional way. Commonly used in Jazz, Fusion, Blues, Film Scores. Notable players include Frank Zappa, Larry Carlton, Pat Metheny. Use over 7#11, 9#11 chords. Ideal for non-resolving dominant chords (the 'Simpsons chord'). Gives a sophisticated twist to blues progressions.

Notes: A#, C, D, E, F, G, G#

Intervals: 1P, 2M, 3M, 4A, 5P, 6M, 7m

Degrees: 1 2 3 #4 5 6 b7

Formula: W-W-W-H-W-H-W

Number of notes: 7

Tuning: Open A (E-A-E-A-C#-E)

Also known as: lydian b7, overtone

About Open A Tuning

Open A tuning (E-A-E-A-C#-E) produces an A major chord when strummed open. It is structurally identical to Open G tuned up one whole step, delivering a brighter, more tense sound that works particularly well for slide guitar centered on the key of A.

Jimmy Page used Open A with a slide on Led Zeppelin's 'In My Time of Dying' from Physical Graffiti (1975). Rory Gallagher also employed Open A for his raw, energetic slide work. Many players achieve Open A by simply placing a capo at the 2nd fret in Open G tuning, which is why dedicated Open A usage is less commonly discussed. However, without a capo, Open A gives direct access to the open A string resonance and a different feel under the fingers due to the higher tension.

BluesSlide GuitarRockDelta Blues

Notable artists: Jimmy Page, Rory Gallagher, Delta blues players

Best for: Slide guitar in the key of A, blues playing, and situations where you need the brightness of Open G tuned up without a capo

Musical Character

BrightQuirkyDominantSophisticated

Combines Lydian's floating brightness (#4) with Mixolydian's bluesy dominance (b7). The result is a scale that is both dreamy and grounded — bright without being sweet.

Chord Progressions Using This Scale

ii – bII7 – I (Tritone Substitution)Jazz / Soul — Mystery & Tension
iv – ♭VII – I (Backdoor Cadence)Jazz / Soul — Soulful & Unexpected

Explore This Scale in Other Tunings

← All Guitar scales in Open A tuning