mWarped Linear Prediction Filter

The Warped LPC filter plugin simulates the structure of a warped linear-predictive codec implemented with warped lattice filters.

Linear prediction coding 'whitens' a signal by performing a spectral analysis and filtering out peak components. The output can then be used as the input to a similar reconstruction filter that adds the spectral peaks removed in the first step.

Warping the frequency scale of the predictor allows for the frequency scale to match the human auditory system. Individual adjustment of the warping parameter at each stage allows the user to create interesting effects by filtering using a frequency-dependent adaptive filter, and filter coefficients can be rotated to create bizarre phasing effects.