So om chanting without voice. Can it be done? I think so. So remember, montras can be done silently, which, once again, is explained in the guide. Ah, so do your madules dress sleep in any way? Yes, but not as much as they could. There isn't a madule on sleep. But there are a couple of meditations on sleep. You know, when some one says, i have trouble sleeping, my mind does this all over again. When people ask, you know, how long does some one need to stay in therapy, my mind doesn't go to one answer. My mind does this. Ok, hope.