There is no little to better no alpha during PhotoReading
Activation uses a combination of alpha, theta and beta. It varies from book to book and with the PhotoReaders experience. So there is little point in trying to create some sort of entrainment for activation.
With PhotoReading we have found that even beginners have the same brainwaves while flipping the pages so it isn't necessary to make a big deal about getting into the right state, you just do.
Alex
