Before revision: The Laplace transform transfer function of the FOH is found by substituting s = i 2 π f: {||-|||-|||} This is an acausal system in that the linear interpolation function moves toward the value of the next sample before such sample is applied to the hypothetical FOH filter.
After revision: The Laplace transform transfer function of FOH is found by substituting s = i 2 π f: {||-|||-|||} This is an acausal system in that the linear interpolation function moves toward the value of the next sample before such sample is applied to the hypothetical FOH filter.