The Stone Tape

A terror from the typewriter of Quatermass creator Nigel Kneale, starring Michael Briant and Jane Asher as members of a scientific team who seek a new medium on which to record sound, and thus render magnetic tape obsolete. How could they know until too late, of course, that the very stones used to build their workplace have retained a terrifying supernatural recording from centuries ago? The soundtrack of bleeps combined with distorted slavering is enough to kick-start a coronary.