Lydian mode
A musical mode identical to the major scale but with a raised fourth degree, creating a bright, floating, otherworldly quality.
In Depth
The Lydian mode uses the same notes as a major scale but with the fourth degree raised by a half step — for example, C-D-E-F#-G-A-B-C. This single alteration, the tritone between the root and the raised fourth, transforms the character entirely: where the major scale feels grounded and stable, the Lydian mode sounds luminous, weightless, and slightly surreal. It avoids the natural pull toward the subdominant that anchors the major scale.
The Lydian mode is ubiquitous in film scoring, where composers like John Williams use it to evoke wonder, heroism, and the fantastical — the opening of the Star Wars theme and the "flying" music from E.T. both exploit Lydian coloring. Jazz composer George Russell built an entire theoretical system around the Lydian mode, arguing in his Lydian Chromatic Concept of Tonal Organization (1953) that it, not the major scale, is the true parent scale of Western music.
George Russell's Lydian Chromatic Concept, published in 1953, was the first theoretical work to provide a systematic basis for modal jazz — Miles Davis studied it before recording Kind of Blue.