The vowel should receive the greater value. It should resemble the temple chant rather than the humming of bees. If each person present listens, imaginatively, for the sound of the world's servers as the OM is sounded, the tone is most likely to represent the note of the group soul. We do not recommend entering into meditation more than once a day. Excess is unwise.
Excessive meditation is sheer folly.
The meditator who is mature enough to have achieved regularity in all his meditation work and who thereby lives a well regulated life, will not be inclined to excess. The most suitable meditating posture within a group meeting is sitting with the spine comfortably erect, feet flat on the floor and slightly apart, with hands on knees, palms down. If you do not find a chair the right size for you, or if the chair you are using does not permit ideal posture, try at least to sit comfortably enough to forget the physical body. If the chair does not permit reasonable comfort, do not let a minor detail interfere with work of major importance. That is, if you do it, do it regularly every month, since it is the rhythm of the full moon observance that makes the work effective.