AN INEXPENSIVE METHOD FOR PROGRAMMING STIMULI USING MAGNETIC TAPE
Stephen W. Porges, Hiram E. Fitzgerald · Psychophysiology · 1970
ABSTRACT Apparatus for encoding and decoding stimuli using magnetic tape is described. The decoder is a frequency specific audio switch constructed from a five channel resonant reed relay; the encoder is a tape recorder. This apparatus allows the advantages of magnetic tape yet is inexpensive to construct.