mr dave

It would depend on the manufacturer's specifications in each unit but from what I've always read the main difference between any 'swirly' pedal like a phaser, flanger, chorus is the scope of the potential range for the envelope filter. It's differences measured in milliseconds.

Pretty sure the main difference you'd notice is that a phaser tends to be more subtle while the univibe (if I remember correctly) is closer to a chorus and a more prominent effect.

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