OM ( ॐ ) is the collective sound of the Universe, the Primordial Sound.
As it's the sound of the Universe, it’s always present, so technically we can’t chant it. We cannot create OM by a chanting of it; we only produce a vibration sympathetic with the vibration that is already there, which is OM. It is not a chant made by us, created by us, or initiated by us. Rather, we establish a connection between ourselves and the Supreme Reality, which manifests itself as sound vibration in the form of OM.
A way of chanting OM is in its separate form. In one breath chant, “Aaaa-Uooo-Mmm,” followed by silence. The fullness of the “A” sound collapses into “U,” then “M,” and finally the silence of all 3 together once they have ended on the gross level. The waking, dreaming, and deep sleep states merging into the Oneness of the Absolute. When OM is part of our mantra, we experience the fully expanded level of creation, attuning our souls to the Ultimate Reality-Roger Gabriel
Art by @tripppytaurus