C# Lydian #9 Guitar Scale
Guitar scale in Drop D tuning — fretboard diagram
C# Lydian #9 in Drop D — Notes and Intervals
The C# Lydian #9 scale is an exotic and aggressive variation of the Lydian mode. On Guitar, the notes are C#, E, F, G, G#, A#, C. It features a wide melodic gap that gives it a fusion edge, perfect for high-energy solos and modern jazz compositions that require a sharp, biting sound. Commonly used in Fusion, Modern Jazz, Progressive. Notable players include Allan Holdsworth, Brett Garsed. Use over 7#9#11 chords. A specialized fusion tool for adding a sharp, biting edge to Lydian-based lines.
Notes: C#, E, F, G, G#, A#, C
Intervals: 1P, 2A, 3M, 4A, 5P, 6M, 7M
Degrees: 1 #2 3 #4 5 6 7
Formula: WH-H-W-H-W-W-H
Number of notes: 7
Tuning: Drop D (D-A-D-G-B-E)
About Drop D Tuning
Drop D tuning lowers the 6th string from E to D, giving you instant access to heavy power chords with a single finger. This deceptively simple change opens up a world of heavier riffs, deeper bass notes, and new chord voicings that are impossible in standard tuning. The low D string creates a powerful foundation for rhythm playing while keeping the rest of the fretboard familiar.
Drop D is one of the most versatile alternate tunings in modern music. From the crunchy riffs of grunge and alternative rock to the thunderous breakdowns of metal, this tuning has shaped the sound of countless iconic songs. It's also surprisingly useful for fingerpicking and acoustic arrangements where you need a deep bass drone.
Notable artists: Foo Fighters, Soundgarden, Rage Against the Machine, Tool, Killswitch Engage
Best for: Power chords, heavy riffs, drop-tuned metal rhythm, and acoustic arrangements with a deep bass drone
Musical Character
An exotic Lydian variant with a #9 that creates a wide melodic gap — aggressive and biting, perfect for high-energy fusion solos.