Adaptive Noise Reduction Doesn't Work Properly
Adaptive noise reduction doesn't work properly, It leaves noise at the beginning of the sound sample!
Matt Stegner commented
This is how the effect is designed. It is now a legacy effect and has been replaced with the new DeNoiser effect. Please use the new DeNoiser effect in place of the Adaptive Noise reduction.
There is no plan on changing or fixing the Adaptive Noise Reduction at this time.