A# Lydian Mode

What is the A# Lydian Mode?

Lydian is the fourth mode of the major scale, distinguished by its raised 4th degree (#4) which creates a dreamy, floating sensation that sounds like the major scale but brighter. You'll hear it in film scores, Steve Vai solos, and Joe Satriani's melodic work — any time a composer wants to evoke wonder or weightlessness. Here's how the A# Lydian Mode lays out on the fretboard. This scale is enharmonically equivalent to Bb Lydian.

Notes and Positions

The fourth mode - dreamy major with raised 4th. Very bright. On bass, this scale becomes a toolkit for strong roots, passing tones, and melodic fills that still support the groove. Think in root-on-E and root-on-A boxes, then adapt the same notes for 5-string bass when the low B string gives you another root below the pattern. In the key of A#, the notes are: A#, B#, C##, D##, E#, F##, G##.

How to Use It

You'll often hear it in Film Scores, Jazz, and Progressive Rock. A good way to internalize the sound is to sing the root, then sing a few scale degrees before you play them.

Loop a simple drum groove and keep every note locked to the subdivision before adding fills. Use the interactive fretboard above to spot repeats of the same note on different strings and frets.