I've been excited in the past by reverb models that offer recreations of famous spaces, like topline recording studios.
Then a friend invited me to listen to her performance while lying on the floor with my eyes closed.
She began a drone and my sense of the environment shifted.
I forgot where I was as the illusion of floating in a 'no space' pushed back the walls with a never-ending note.
Since then I've had similar experiences with classical Indian music and pondered the sense of spirituality that follows from losing sense of the self.