Piano: F Whole Tone Over the Changes
Where F Whole Tone lies at this seat, and what a chorus takes out of it.
F Whole Tone runs 6 notes to the octave, laid out here across 88 keys with every F flagged. Mid-chorus the pattern is not what you need; where the root is when the chord changes underneath you is.
Weightless and dreamlike — six equal whole steps with no leading tone, so nothing pulls anywhere. Blurry, floating, and faintly unsettling, like a dream sequence.
Heard in: Impressionist piano (Debussy's "Voiles"), Thelonious Monk's runs, dream-sequence film cues, and the augmented and 7#5 chords it fits in jazz.
The right hand takes the line and the left keeps stating the chord under it, which makes a scale at this seat a two-handed problem: the notes have to work against a voicing you are choosing at the same time.
Play it slowly against the audio until it stops being a shape, then put it over two bars of a form and let the chord tones decide which of the notes you actually keep.