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Often, though, people used "hypnogogic" to refer to the state between waking and sleeping, not distinguishing the direction.
Good time for inner work, like Jungian work with active imagination.
I personally don't associate this state with mind control, although any dissociative state could be used for that purpose. I try to be careful to separate techniques from the motivations of those who employ them. Power, symbols, or psychology can be used for good or ill.
I associate it with spiritual awakening, with developing expanded awareness.
This music could be used to help someone experience that kind of state, although it would not be the way I would proceed.