diff --git a/lib/radio/ddc/sim/tb_results.m b/lib/radio/ddc/sim/tb_results.m
index 6a5d8a1..c5111ec 100644
--- a/lib/radio/ddc/sim/tb_results.m
+++ b/lib/radio/ddc/sim/tb_results.m
@@ -12,9 +12,6 @@ Q_out_dec = TEXTREAD('q_dec.txt')';
 I_out_fir = TEXTREAD('i_fir.txt')';
 Q_out_fir = TEXTREAD('q_fir.txt')';
 
-I_out_fir = I_out_fir(1:2:length(I_out_fir));
-Q_out_fir = Q_out_fir(1:2:length(Q_out_fir));
-
 N_dec = length(I_out_dec)-2*N_pfir;
 N_fft_dec = N_dec
 N_fft2_dec = N_fft_dec/2;
@@ -31,10 +28,11 @@ f = (1:N_fft_dec)/N_fft_dec;
 g = (R*M)^N;
 H = abs(sin(pi*M.*f)./sin(pi.*f/R)).^N;
 
-H = max(fft_y2_fir(1:2))*H ./ g;
+[v, j] = max(fft_y2_dec(1:N_fft2_dec/2))
+H = v*H/H(j);
 
-wavwrite(0.9*[I_out_fir'-mean(I_out_fir) Q_out_fir'-mean(Q_out_fir)], 8000, 16, 'iq_cfir.wav');
-wavwrite(0.9*[I_out_dec'-mean(I_out_dec) Q_out_dec'-mean(Q_out_dec)], 8000, 16, 'iq.wav');
+wavwrite(0.5*[I_out_dec' Q_out_dec'], 16000, 16, 'iq.wav');
+wavwrite(0.5*[I_out_fir' Q_out_fir'], 8000, 16, 'iq_cfir.wav');
 
 % Output
 close all;