अकार चरणयुगुल। उकार उदर विशाल। मकार महामंडल। मस्तकाकारे।।
The Akaar in the A -U - M are Ganesha’s two legs, the Ukaar is Ganesha’s large, rounded stomach and the Makaar is the shape of his large head.
हे तिन्ही एकवटले। तेथे शब्दब्रह्म कवळले। ते मियां गुरुकृपा नमिलें। आदिबीज।।
Where the three elements of AUM gather together the entire universe of the word is embraced. With the permission of his teacher, the author pays obeisance to this deity that is the seed of all.
http://youtu.be/t9ChU9J1IPM