Re: Visual Entrainment

Typically visual entrainment (photic stimulation) is accomplished with
Audiostrobe encoding of sound files, which is a subcarrier encoding
method used to drive an external light array for photic stimulation
sessions.  Most photic stimulation eyeglass sets include some form of
Audiostrobe capability, by splitting the line level out or headphone out
from an audio source to the eyeglass hardware which in turn pulses
goggle LEDs according to the Audiostrobe subcarrier.

Transparent Corp (http://www.transparentcorp.com) has a variety of
applications and plugins for that purpose; someone told me a while back
that they also have a plugin for screen blanking that can be used to run
a photic stimulation session by dynamically modifying the screen refresh
rate to achieve the desired brainwave state.

Audiostrobe subcarrier encoding can also be done by hand with Audacity,
for example http://craigtavs.wordpress.com/2012/01/18/audacity/.


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