EquirippleFilter[N, {f_{1}, f_{2}, ...}, {v_{1}, v_{2}, ...}, {w_{1}, w_{2}, ...}] returns a 1D linear-phase FIR filter of length N with band edge frequencies given by f_{1}, f_{2}, ..., desired magnitude values given by v_{1}, v_{2}, ..., and relative weights in each band given by w_{1}, w_{2}, ... and that exhibits equiripple behavior in the frequency range of interest.