Ayan is the orisha of musical instruments, particularly the drum and stringed instruments. In African culture, the drum is the main instrument for inducing trance. It does this through mimicking the heart beat. The drum is the heart of the earth.
The importance of trance is to inculcate programs into our subconscious (the driving spirit). We are suppose to write our own programs, but since most of us do not understand the role of trance, our exploiters write programs for our subconscious to follow.