Most importantly, those with a predisposition to epilepsy may be affected when using brainwave entrainment technology.
However rare, there is a risk of seizure associated with individuals who are predisposed to epileptic fits. Typically, entrainment rates over 30 - 40 Hz have been observed to aggravate epileptic conditions. In order to maintain a safe entrainment experience the 3P DEAP entrainment encoding in the Brain Evolution System does not use any rates above 25 Hz.
Consult your doctor directly if you have any questions or concerns regarding audio brainwave entrainment technology's effect on epilepsy.