What is a chord progression, and how is it different from changing keys?
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Imagine a piano. Now imagine that you only play on the white keys. This is the “key of C.”
Imagine playing several notes at once, using only those white keys. Each set of notes you play is a chord. Moving from one set of notes (chord) to another set of notes is a *chord progression.*
Let’s say you wanted to incorporate the black keys. Well, those don’t exist in the key of C, so you would need to *change keys,* that is, change which set of notes you can play, in order to include the black ones.
Sidebar: A regular major scale is a set of notes which follows a particular pattern, and the *key* is which note you’re starting on when making the pattern. So “key of C” is starting that pattern on the C note of the piano, and “key G” would start the pattern on G note. Each key incorporates a different set of white and black keys based on the established pattern (major scale).
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