Pretty much.
As the sane one, I can tell you that the theremin actually operates on a very simple principle, and was a part of Theremin's interest in reviving the dead by reintegrating the spirit with the corporeal remains. Put simply, the theremin is a ghost catcher, trapping the life essence of a departed one in its electromag(net)ic fields. As Mrs Beeton would allegedly have said, first catch your ghost.
The spectre howls when you tickle it.