The harmony is simple on purpose: it leaves room for the two voices in thirds and for the viola caipira. A V7 before returning to I and a pass through ii are the most typical touches. Change the order of the four chords and you have the verse and the chorus.
Progressions to start with
Chords in G
Numerals
Function
Play
G – D – Em – C
I – V – vi – IV
Tonic – Dominant – Tonic · relative – Subdominant
Em – C – G – D
vi – IV – I – V
Tonic · relative – Subdominant – Tonic – Dominant
G – Em – C – D
I – vi – IV – V
Tonic – Tonic · relative – Subdominant – Dominant
C – G – D – Em
IV – I – V – vi
Subdominant – Tonic – Dominant – Tonic · relative
G – C – Am – D7
I – IV – ii – V7
Tonic – Subdominant – Subdominant – Dominant
What it does not do
It does not use AI or write the song: it suggests chords from harmony rules, and the melody and lyrics are yours.
It does not make audio to release: the sound is a simple guide for trying ideas.
It does not analyse existing songs or tell you which hit uses a progression: chords have no owner and repeat across thousands of songs.
It saves nothing and sends your choices to no server: everything happens in your browser.
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