Firstly, understand that trying to connect to a race has nothing to do with connecting to spirit, mental mediumship, trance work, or physical mediumship. People who achieve contact generally become the portal or gateway for contact.
I believe that hybrids can connect to their point of origin with training and using methods of contact do not need to connect to spirits or any other being to assist them to get to their race.
When people talk about Hetrodyning it is understood that a person is one frequency and then by connecting (reaching out) to the other being the middle ground is found and then communication can take place.
But there are other processes that are used in contacting beings of other races.
There is a process of "stepping" and stepping through vibrations allows a person to reach the intended target being.
There is the process of "compression" where the molecular structure of the room is compressed by the contactee and the beings simply step into that state.
There is another process of enabling a spirit person to raise a vibration and then you "jump" to a race.
There are other techniques which rely on proper training and methods for accurate contact in the Zeta Mind hand book.