The purpose of the rhythm circle is to learn to listen and improvise with rhythms. Heartbeat rates related to 60 beats per minute (ratio), and fast-as-possible reaction time is studied. Fast reaction time is essential to survival. It is also important for responding to a variety of situations and particularly music, dancing and sports. Fast reaction time can increase your ability to discern and refine rhythms whatever the discipline.

Pauline Oliveros, Deep Listening, loc. 269