A simple pranayama for instance is just to sit down in a chair, relax the body and breathe slowly, imagining that at the moment that you breath the sexual force is going up to your brain and entering into your heart, through the spinal column, and when you exhale the air just pronounce the letter S. Sssssss. This is what is called the still, small sound. It is written that Elias heard the way in which the sound of the S transmutes the force.
The True Man