60's psychedelic instrumentals.
Play a loop of infrasound under the music playlist and see if that has the desired effect.
And who's going to pay for the medical and therapy bills if that loop causes extended harm to the listeners?I'd suggest using the standard music from the period, but with one addition.
Infrasound - Wikipedia, the free encyclopedia
Some of these frequencies can cause feelings of dread that the listener can't put their finger on because they can't hear them. Play a loop of infrasound under the music playlist and see if that has the desired effect.