Om is a duo formed in 2003 by the rhythm section of the disbanded Stoner doom metal band Sleep. The band's first three albums feature Al Cisneros on vocals and bass and Chris Hakius on drums. Their music is similar in structure to Tibetan and Byzantine chant.
The band's name comes from the Hinduism concept of Om. It refers to the natural vibration of the universe. Hindus believe that as 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 "Shunyākāsha", the emptiness or the void. Shunyākāsha, meaning literally "no sky", is more than nothingness, because everything then existed in a latent state of potentiality. The vibration of "OM" symbolizes the manifestation of God in form ("sāguna brahman"). "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. 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 Shakti (liberation, and/or destruction).