In music, the first mode of the major scale, with the following half step/whole step progression: W-W-H-W-W-W-H.
The Ionian mode is identical to the major scale
For example:
  • C Ionian contains the notes C D E F G A B
  • Db Ionian contains the notes Db Eb F Gb Ab Bb C
  • F# Ionian contains the notes F# G# A# B C# D# E#
  • Two ways of playing the G Ionian scale in guitar tablature form:
    Three notes per string:
    e|--------------------------------5-7-8-|
    B|--------------------------5-7-8-------|
    G|--------------------4-5-7-------------|
    D|--------------4-5-7-------------------|
    A|--------3-5-7-------------------------|
    E|--3-5-7-------------------------------|
    
    Staying in the same neck position:
    e|----------------------------2-3-5-----|
    B|------------------------3-5-----------|
    G|------------------2-4-5---------------|
    D|------------2-4-5---------------------|
    A|------2-3-5---------------------------|
    E|--3-5---------------------------------|