The Anti-Alias section provides control over anti-aliasing filters that can be used before and after downsampling to reduce aliasing in the resampled audio signal.The Pre control adjusts the anti-aliasing filter cutoff applied to the audio signal before resampling. The filter is applied as a multiplier of the sample frequency (Fs) between 0.12 Fs and 2.00 Fs.The Post control adjusts the range of anti-aliasing filter cutoff applied to the audio signal after resampling. The filter is applied as a multiplier of the sample frequency (Fs) between 0.12 Fs and 2.00 Fs.For a much grittier sound, disable the Anti-Alias filter. The Anti-Alias button is lit when the filter is enabled.