IiiiIVV

Blues / Rock · A# / B♭

I-III-IV-V in A#

A blues-influenced progression with a major III chord instead of the diatonic iii minor. The major III gives it a bright, slightly unexpected lift.

Chords in A# I-III-IV-V

IBb
iiiD
IVEb
VF

Hear I-III-IV-V in A#

I-III-IV-V in All 12 Keys

CC – E – F – GC#D♭Db – F – Gb – AbDD – F# – G – AD#E♭Eb – G – Ab – BbEE – G# – A – BFF – A – Bb – CF#G♭F# – A# – B – C#GG – B – C – DG#A♭Ab – C – Db – EbAA – C# – D – EA#B♭Bb – D – Eb – FBB – D# – E – F#

Other Progressions in A#

I-IV-V-IBb – Eb – F – BbI-V-vi-IVBb – F – Gm – Ebii-V-ICm – F – BbI-vi-IV-VBb – Gm – Eb – F12-Bar BluesBb – Eb – Bb – F – Eb – Bb – FIV-I-V-viEb – Bb – F – Gm

Related Progressions

12-Bar Blues in A#Bb – Eb – Bb – F – Eb – Bb – FI-IV-V-I in A#Bb – Eb – F – BbI-V-vi-IV in A#Bb – F – Gm – EbI-vi-IV-V in A#Bb – Gm – Eb – F

I-III-IV-V in A# / B♭

The I-III-IV-V progression in the key of A# uses the chords Bb, D, Eb, F. These correspond to the I, iii, IV, V degrees of the A# major scale.

A blues-influenced progression with a major III chord instead of the diatonic iii minor. The major III gives it a bright, slightly unexpected lift. In A#, this progression has a characteristic sound shaped by the tonal colour of the A# root — also written as B♭ — common in blues / rock. Practise hearing it until the sequence feels inevitable rather than surprising.