And a resistor, later turned variable, to change its time constant at the player's will. There has to be a timing capacitor of a small value for the clock alone, leading to pin 7. But pins 5 and 6 were left floating because Korg decided to run the 3102 in separate excitation mode.
Pins 5, 6 and 7 are meant to control the clock frequency. So I just read the service manual more carefully as well as the MN3102 datasheet. If the delay is too short, it makes up for the ringing, metallic tone so characteristic of flanger effects. Because the effected signal gets processed over and over. When the delay time is long enough, feedback determines the number of audible repetitions. Although it can be either positive or negative. Feedback in a delay line works much like resonance in a filter.
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