So what was next for Mort? The occult! He called himself Ataraxia, and with Moog in hand (or on floor), he composed a spooky soundscape with magic and seances. This is the title track, and you can hear the addition of a more driving (almost disco) beat to the music. This was somewhat keeping in line with the changing decade of more 'danceable' music. At 1:33, it really picks up with an great repeated riff, using the flatted-fifth for a more menacing sound.
By this point, Garson was getting out of releasing albums. He released one more LP called "Plantasia", a serene electronic album to be played for plants (!). There was one more disco single under the pseudonym Captain D.J. But he had been steadily composing themes for TV and film since the 60s (including National Geographic, and various game shows), so was continuing with that. He contributed to music for the film "Kentucky Fried Movie", and did some broadway music in the '80s. He died Jan. 4, 2008, at the age of 83.
Song : "The Unexplained" by Ataraxia
From the LP "The Unexplained : Electronic Musical Impressions Of The Occult" (RCA Victor) 1975
Get it here : The Unexplained