The Sphere is the 8th chakra, your aura. The long Ek Ong Kar is a primary trigger for releasing Kundalini Shakti from the core into the aura.
The Long Ek Ong Kar chant invokes the primal energy that created the whole universe, so it is important to make choices in what you are creating either consciously or unconsciously. This chant is an amplifier. The first power is “vac siddhi”, sound that opens from the throat chakra. First Kundalini must be raised through the Thymus, which is only opened through authentic joy.