← Free Interactive Tool

Mode Comparison · Guitar Theory

Ionian vs Aeolian — Major vs Minor

The most fundamental contrast in all of Western music

Same notes, different starting point. Ionian starts on the 1st degree (happy), Aeolian on the 6th (sad). The ♭3 ♭6 ♭7 in Aeolian are what create the minor character.

Ionian

W W H W W W H

1 2 3 4 5 6 7

Aeolian

W H W W H W W

1 2 ♭3 4 5 ♭6 ♭7

Where Both Modes Fit in the 7-Mode System

Both Ionian and Aeolian are diatonic modes — they share the same 7 notes as the major scale but start on different scale degrees. Understanding the relationship between all 7 modes is the foundation of the Dead Sea Scales system.

Beyond the 7 Modes — The 5 Missing Notes™

Once you understand how Ionian and Aeolian relate to each other, the next step is the 5 Missing Notes™ system — 5 chromatic notes that generate 35 additional scale variations, giving you 42 total modes to work with.

Hear and play both modes side by side — free

Switch between Ionian and Aeolian instantly · All 12 keys · Audio playback · All 42 exotic variations

Open Free Interactive Tool →

DEEP DIVES

Why 42 Modes? Dead Sea Chords 2,048 Combinations Pentatonic Origins Where Notes Came From Guido d'Arezzo George Russell All Resources