What is a diatonic progression?

A diatonic progression is a sequence of chords that is derived from the notes of a specific key or scale, adhering to its tonal framework. This means that the chords used are built from the seven diatonic scale degrees, typically involving major and minor chords that fit within the key. For example, in the key of C major, a diatonic progression might include the chords C, Dm, Em, F, G, Am, and Bdim. These progressions create a sense of movement and resolution that is characteristic of Western tonal music.