I whole-heartedly applaud this description of that which cannot be described. Hari Om.

Om 108 times:)

Is Praṇava only used in connection with om?  And furthermore, when we utter om, on its own, or in a mantra, a hymn, a devotional song, an end to a yoga practice...what does it mean / is it for?  Does it connote Īśvara / God / the Supreme, or have we westernised its meaning, to denote something less than that, e.g. a nice or mystical sound associated with yoga?  Or could the power and vibration of it connote the supreme anyway whatever name and form we assign to it?