A# Diminished Cliché
I – ♯I°7 – ii – V progression in A# major
A# Diminished Cliché — I – ♯I°7 – ii – V
The A# Diminished Cliché (A# – Bdim – Cm – F) uses a chromatic diminished 7th chord built on the raised first degree as a passing chord between the tonic and ii. This half-step ascent created the nostalgic, sophisticated sound of Tin Pan Alley and 1930s jazz standards. With seventh chords (A#Maj7 – Bdim7 – Cm7 – F7), the chromatic motion is even smoother.