Yes, I believe this to be true. Just like remembering what your favorite food smells like will make your mouth water, pulling from past OBE sensations and focusing on them can help get you to that place in the future.
Think of the tapes and other aids like training wheels on a bike. After a while, you find the balance needed to ride the bike and you discard the training wheels.
:I understand that after a while we really do not need the tapes to achieve different states of consciousness. How do I remember Hemi-Sync signals?
A: It is true that with practice, you do not need the tape exercises to reach expanded states of consciousness. After you become proficient with an exercise, all you need to do is recall the sensations you experienced during what you consider to be your best, most effective response in the desired states. Simply take a deep breath and remember the state to trigger the change in consciousness.