Thank you for input. It feels, as you both said, it needs research. Was looking around on google about supposed dangers of brainwave entrainment and got just that warning that it also could make sensitive persons seizure, which is not the kind of fear we intented to induce. But I also read an article about binaural beats and people using it as drugs, which made me take about any internet-fact about it with a grain of salt.
The seizure bit seems plausable though, thinking that flashing lights have that effect on sensitive persons and is probably also effecting brainwaves.
And to be clear, not interested in this because of the supposed drugeffect.
Thanks again, if something concrete turns up I'll drop a reply.