The original Flanger effect was created by using 2 tape recorders with same thing recorded on both with one just running a bit ahead of the second. Then by putting your thumb on the edge of outside flange of the one in front you physically slow it down so when the other catches up it causes a flanged sound.
That's right kids. It was a bit hit and miss and most notable did not have a cycling modulation. In short it did not go sweep,sweep.sweep by setting up the cycle with knob for the tempo of those sweeps.
Mr. Black has made a pedal that imitates the 'real' flange sound.
In a normal Flanger one of two signals moves forward leaving the fixed dry signal in tact then it sweeps back into phase and goes again. If you delay the dry signal when the signal returns to where it started and it ends at zero which is normal start of being in phase.
So it heads back out but for moment there is not any effect going on until it catches up to the delayed signal and starts to flange. It physically is just the reverse of how the tape works. With tape the one signal is slowed down and with the box the opposite signal catches up. With the box the flanged signal coming back to zero then leaving again will catch up to that delayed dry signal.
In short with tape the signal out front is slowed down but with the box it is the signal returning from zero is catching up. The results are the same.
Unfortunately the signal that returns from zero to the delayed signal is going to take a moment. During that moment there isn't any flanging going on.
So a bit of regular flanging can be added to mask the drop out.
He calls the effect a 'barberpole' through-zero flanger.
It will do the conventional flanger thing too. You can also blend the two.
Go to 24:59 for the demo. They use the Tunnelworm which is virtually the same pedal. The Shepard is the 4th version from Mr Black and all 4 have a different name. lol
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