Original upload date: Fri, 08 Apr 2011 00:00:00 GMT
Archive date: Sun, 05 Dec 2021 07:06:12 GMT
Between about 1955 and 1959 the most pathetic attempt at a directional sound to be ever tried in cinemas was released (escaped). They even had the dishonesty to call it stereophonic! Since the source
...
was an ordinary mono optical track how could it possibly be stereo. At one point this demo film even purposely degrades the audio to make the Perspecta sound better in comparison.
Three tones , 30, 35 and 40Hz, are recorded on the track the level of which controls the volume from the left, centre and right speakers. Of course all sounds present move around at the same time so you will notice only one sound is present during these samples
