The minimum sampling rate(fs) is equal to twice the highest audio input
frequency(fa).If fs is less than two times fa ,distortion will result. The distortion is
Called aliasing or fold over distortion.
The side frequencies from one harmonic fold over into the sideband of another
harmonic. The frequency that folds over is an alias of the input signal hence ,the
names “aliasing” or “fold over distortion” .
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