https://www.youtube.com/watch?v=sM-bEA1DlvI

There is a story of the power of the rattle for shamanic trance states, or even shamanic journeying:

“The first time I went to the World of the Spirits I was standing with three other people in a small circle. We were all rattling. Suddenly the Earth opened up in front of me and I fell into the Lower World.” When I heard this I thought, “I’d better get me a rattle.” 

A rattle is simple, but its sound can be quite hypnotizing, here I give a short introduction on how to use the rattle. In the shamanic procedure of “Calling the Spirits” a rattle is used;  Calling the spirits is sometimes seen as the most basic stage of the shaman’s work., and it is based on”a basic rattling ritual’.