Mode
A Lydian
The A Lydian mode — A B C# D# E F# G# — shown across the guitar neck.
Swipe the neck sideways to see the higher frets.
A Lydian is the major scale with one note changed — the #4, D#. That single note is what the mode sounds like; lean on it and the colour is obvious, avoid it and you are just playing major.
Notes
A B C# D# E F# G#
Intervals
1 2 3 #4 5 6 7
Parent scale
E Major
Degree of parent
4
The tool shows this from its parent key, E major, with A marked as where Lydian begins, the same seven notes centered on E.