Listen up: scales aren’t just torture devices invented by guitar teachers... When you use a scale, say, C major, you are playing ‘in the key of C’. The word ‘diatonic’ simply means ‘within a key’, so ...
A normal C major chord is C-E-G, but you can easily change it to E-G-C, called the 'first inversion', or G-C-E, the 'second inversion' - the bass note has changed, but it's still the same chord, with ...