The Sufi belief system holds Hu as the sound of God, the sound of Divinity. Another modern belief system, Eckankar, also uses the Hu mantra extensively. The power and pure vibration of a Hu chant of this magnitude is amazing, leaving a person feeling transformed and uplifted. This chant opens the heart to experiencing the Divine Life Force that sustains all life. This Life Force can be seen within as Light and heard as Sound. It has helped many of different faiths open their hearts more fully to the uplifting presence of God.
Hu is chanted in a similar fashion to Om. Chant, Huuuuuuuuuuuuuuuuuuuu, allowing the sound to come from deep within. Let it last as long as it wants to. Like the Om, it will immediately raise your vibration and the vibration of the space you are in.