A# Ionian (major)
A diatonic mode with a major 3rd and major 7th; a stable major sound.
Octaves
Musical context
How the mode relates to the scale, chord, key and progression.
Theory
General info
- Name
- A# Ionian (major)
- Family
- Diatonic modes
- Note count
- 7
- Step formula
- W – W – H – W – W – W – H
Notes & degrees
1A#root
2B#major 2nd
3Dmajor 3rd
4D#perfect 4th
5E#perfect 5th
6Gmajor 6th
7Amajor 7th
Construction
- Overview
- A diatonic mode with a major 3rd and major 7th; a stable major sound.
- Application in music
- Identical to the natural major scale and forms the modal basis of a major key.
- Interval formula
- A#WB#WDHD#WE#WGWA
- Reference mode
- A# Ionian
A# Ionian (major) coincides with the A# Ionian mode — it is the reference itself.
How the mode is built
- Position in the system
- Degree 1 of the parent major scale
- Parent scale
- The Ionian mode is itself the major scale
Sibling modes
Chords by degree
Tensions & resolutions
Stable degrees
IA#point of resttonic
IIIDdefines modal qualitythird
VE#supports the tonic sonorityfifth
Typical resolutions & tensions
VIIAA
IA#A#
In typical voice leading, the leading tone rises by semitone to tonic.
IIIDD
IVD#D#
In a dominant context, scale degree 4 normally descends by step to 3.
IA#A#
IIB#B#
Scale degree 2 may descend to tonic; the motion is especially close when degree 2 is lowered.
This mode on guitar 🎸
See how A# Ionian (major) looks on guitar.
Circle of fifths
The major key on the same tonic and its neighbouring keys on the circle of fifths.
Connections
Practice
Keyboard Trainer
Reinforce it in practice — play and name notes on the interactive keyboard.