FLANGER- a barber pole through zero Flanger ...that's OK neither do I ???

 MR. BLACK SHEPARD'S END 

  A Barber Pole through Zero flanger. 

  A WHAT???

  A normal flanger

   sweeps up then down in a continuous cycle.

  Well this one  goes up continually or it goes down continually or you can have the sweep sucked though zero point and it goes nuts. LOL