Is it World Suspensions Week? First the Key Chords vi-IV-V-I chords got the treatment (twice!) -- now it's the Pyramids Variations' turn
Suspensions are a great way to get more out of your chords and a good off-the-shelf way to start 'messing around with chords'. You can 'suspend' (haul up) any chord tone and also push them down a scale-step and let them spring back up into place, but you've got to know your chords well before you start or you'll get lost
That's the benefit of studying Pyramids, for example. Knowing a chord sequence inside out frees you up to play with it. The video tells you what chord tone is being affected (1, 3 or 5 - 1 being the root or name-note of the chord), hence 6--5, 4--3, 2--1 etc.
Something like this version is to be found in the final 'Further Variations' section of the Pyramids Variations workbook. Click on the Pyramids link on the right, or on the Musicarta site.-- the Pyramids Variations could be your musical Open Sesame!