Nadabrahma is an old tibetan technique which was originally done in the early hours of the morning. it can be done at any time of the day, alone or with others, but have an empty stomach and remain inactive for at least 15 minutes afterwards. the meditation lasts an hour and there are three stages.
first stage: 30 minutes
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 visualise 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.
second stage: 15 minutes
the second stage is divided into two 7 1/2 minute sections. for the first half, move the hands, palms up, in an outward circular motion. starting at the navel, both hands move forwards and then divide to make two large circles mirroring each other left and right. the movement should be so slow that at times there will appear to be no move at all. feel that you are giving energy outwards to the universe. after 7 1/2 minutes turn the hands, palms down, and start moving them in the opposite direction. now the hands will come together towards the navel and divide outwards to the sides of the body. feel that you are taking energy in. as in the first stage, don't inhibit any soft, slow movements of the rest of your body.
third stage: 15 minutes
sit absolutely quiet and still.