http://supplementlab.org/focus-zx1/

Focus zx1 remember the post of MUSIC TO KNOW THE YOGA 6. Silent sound In this exercise we will try to listen to the sound of an instrument until Focus zx1 stops playing. While they should try to be attentive and silent. When they no longer hear any vibration and feel total silence, they will raise their hands (thus  http://supplementlab.org/focus-zx1/