How to chant OM or AUM?
First, come to a comfortable seated position. Draw your shoulders back and down to open the chest, and keep your back straight. As you inhale lengthen your back towards from the crown of your head, as you exhale send energy down through your hips to the roots. Keep your eyes closed but focused on your third eye.
Aum actually consists of four syllables: A, U, M, and the silent syllable, but we can also break it down the following way: a-ā-u-ū-m-(ng)-(silence). As you inhale widen the back with the breath, allow this divine breath to fill your whole physical being, as you exhale allow the sound A (aw) to slowly flow through your lips with direction, gently transforming into an U (ooo), then evolving into a long M (mmm) that closes as (ng), then merges with silence. Allow yourself to embrace the last syllable of silence before your next AUM.