HUMMING—excerpted from “The Orange Book”, pp 151-154, 1980
"Humming can be a tremendous help and you can do it whenever…At least once a day, if you can do it twice it will be good. It is such a great inner music that it brings peace to your whole being; then your conflicting parts start falling in tune and by and by a subtle music which you can hear arises in your body.
After three or four months you will just be sitting silently and you can hear a subtle music, a harmony inside, a kind of humming.
Sit in a relaxed position with eyes closed and lips together. Start humming, loudly enough to be heard by others and create a vibration throughout your body. You can visualize a hollow tube or an empty vessel, filled only with the vibrations of the humming. A point will come when the humming continues by itself and you become the listener. There is no special breathing and you can alter the pitch or move your body smoothly and slowly if you feel like it."
For this meditation I usually use the first stage of Osho’s Nadabrahma Meditation (click here to order a copy) as background music. After 10-15 minutes of humming in a circle together with the group, I ring a bell and we simply sit silently for another 5 minutes; then I ring a bell at the end to bring everyone back.