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+function Hd = test
+%TEST Returns a discrete-time filter object.
+
+% MATLAB Code
+% Generated by MATLAB(R) 9.2 and the Signal Processing Toolbox 7.4.
+% Generated on: 25-Jan-2018 13:28:23
+
+% Equiripple Bandpass filter designed using the FIRPM function.
+
+% All frequency values are in Hz.
+Fs = 48000;  % Sampling Frequency
+
+Fstop1 = 7200;            % First Stopband Frequency
+Fpass1 = 9600;            % First Passband Frequency
+Fpass2 = 12000;           % Second Passband Frequency
+Fstop2 = 14400;           % Second Stopband Frequency
+Dstop1 = 0.001;           % First Stopband Attenuation
+Dpass  = 0.057501127785;  % Passband Ripple
+Dstop2 = 0.0001;          % Second Stopband Attenuation
+dens   = 20;              % Density Factor
+
+% Calculate the order from the parameters using FIRPMORD.
+[N, Fo, Ao, W] = firpmord([Fstop1 Fpass1 Fpass2 Fstop2]/(Fs/2), [0 1 ...
+                          0], [Dstop1 Dpass Dstop2]);
+
+% Calculate the coefficients using the FIRPM function.
+b  = firpm(N, Fo, Ao, W, {dens});
+Hd = dfilt.dffir(b);
+
+% [EOF]