In Sanskrit, Nada means sound, Brahma is God.
NADA BRAHMA : the Universe is Sound
According to nada (sound) yogis and the scriptures dealing with the subject of nada, the nada brahma, or the ultimate and transcendental sound, is the seed from which the entire creation has evolved. It believes that the world is but a projection of sound alone. The whole macro cosmic universe is a projection of sound vibrations. From that sound the whole world has evolved. In the Bible there is the reference: "In the beginning was the word, and the word was with God." Sufis in India call it soorat, another name for nada yoga practice. The Sufi saints of philosophical temperament also believe that out of sound and form the world evolved. A reality which has manifested itself in the form of vibration. It is a vibration that either does not vibrate at all or at such a high frequency that it is beyond the reach of the human faculty.
The eternal or original nada has the highest rate of frequency and vibration. When any object vibrates at a tremendous and unimaginable speed, it becomes still. It means that the highest point of motion and vibration is stillness. And that nada (sound) appears to be the creative principle of all matter and the entire material substance.
Music is a materialized form of nada (sound) and the movements of prana in the body are also nothing but the expressions of nada. The path is to find out the primal, the finest, the ultimate inner sound. In order to discover this transcendental and non-empirical sound, the process starts from the external gross sound. From there the ultimate form of sound is conceivable only through going into the deeper realms of our consciousness.
ALL THE TRAGEDY IN THE WORLD, IN THE INDIVIDUAL AND IN THE MULTITUDE, COMES FROM LACK OF HARMONY. AND HARMONY IS BEST GIVEN BY PRODUCING HARMONY IN ONE'S OWN LIFE.
MUSIC HAS A MISSION NOT ONLY WITH THE MULTITUDES BUT WITH INDIVIDUALS. ALL THE TROUBLE IN THE WORLD AND ALL THE DISASTROUS ARISING OUT OF IT ALL COME FROM LACK OF HARMONY. THIS SHOWS THAT THE WORLD NEEDS HARMOMY TODAY MORE THAN EVER BEFORE. THE TRUE USE OF MUSIC IS TO BECOME MUSICAL IN ONE'S THOUGHTS, WORDS AND ACTIONS. - Hazrat I. Khan