Harmonised scale in C - here we have all the chords in the key of C. These are each built on the notes of a major scale, just following the alphabet. So any song in the key of C will feature these chords at least 90% of the time. C Dm Em F G Am Bm7b5 C. All the chords are shown with added 7ths, as this makes them sound more interesting, but they are basically the same as this list. Then there is a nice cycle of fourths progression - This works so well that dozens of songs use it, or a part of it. If you use just the last three chords, you are using a minor ii-V-I progression. This chord sequence is very common in jazz - and also Latin and Brazilian music.
