A# Lydian II
I – II – IV – I progression in A# major
A# Lydian II — I – II – IV – I
The A# Lydian II progression (A# – C – D# – A#) uses a major II chord borrowed from the Lydian mode, creating a bright, unexpected harmonic lift before settling on the subdominant. Made famous by Lennon and McCartney, it sounds simultaneously familiar and surprising. With seventh voicings (A#Maj7 – CMaj7 – D#Maj7 – A#Maj7), the Lydian color becomes even more luminous.