"Love is a Four-Letter Word" introduction from Get Carter used to demonstrate tape based chorus effect. This is using a slow triangle wave from an LFO to drive the variable gain CV input. On the first phrase the gain is at zero, resuting in just a flangey sounding output. On the second phrase has the CV gain is increased to create the chorus effect, then zero again, then gain up once more. The effect has been made quite exaggerated here.
Sound not playing? Click here for sound of female vocal through tape based chorus effect.