The mantra "OM" is the name of God, the vibration of the Supreme. When taken letter by letter, A-U-M represents the divine energy (Shakti) united in its three elementary aspects: Bhrahma Shakti (creation), Vishnu Shakti (preservation) and Shiva (liberation, and/or destruction) Shakti.
The syllable Aum is first described as all-encompassing mystical entity in the Upanishads. Today, in all Hindu art and all over India and Nepal, 'Aum' can be seen virtually everywhere, a common sign for Hinduism and its philosophy and theology. As the creation began, the divine, all-encompassing consciousness took the form of the first and original vibration manifesting as sound "OM". Before creation began it was "Shunyakasha", the emptiness or the void. Shunyakasha is more than nothingness, because everything existed in a latent state of potentiality. The vibration of "OM" symbolizes the manifestation of God in form. "OM" is the reflection of the absolute reality, it is said to be "Adi Anadi", without beginning or the end and embracing all that exists.
In Hinduism, Om corresponds to the crown chakra and diamond white light.
Enjoy this calming video and sound..