I ahve made my own hemisync sessions & i've found there can be differences based on just how the frequency changes. A session with sine wave changes (smooth rolling hills, up & down, up & down) has a different effect to square wave changes. (jagged waves, sides straight up & down) Spiky formations (diagonally up to a peak & down again) have yet a different effect again.
Sine wave changes seem to be good for meditation, square waves seem to mess with creativity & diagonal ones seem to benefit lucid dreams. (basic description only - it's more complex than this)
My partner tried hemisync using the public domain version of BWgen & disliked it a lot. I downloaded some sessions from other sources that seemed not to have the effect, & since coming to Australia she has tried my MindMachine without ill effects.
Maybe the BWGen sessions are using a wave form of changes that make you uncomfortable & you react to it? As CFT says, the actual technology of brainwave entrainment doesn't actually cause anything except altering the current frequencies at which the two sides of your mind are operating. Perhaps it's the way the changes are coming that is causing the ill-effects?
Never doubt there is Truth, just doubt that you have it!
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