Educational piece to demonstrate how chord progressions can be achieved in live looping performed music. Two techniques are showed. One is to create different chords as separate loops, in order to switch loop for a musical chord change. Another method is to re-tune one loop on the fly to make it change pitch and become a new chord. This technique, "varispeed", also changes the length and speed/tempo of the loop. You can hear that in the middle section of this song. This adds yet another rhythmic component for the player to consider.