diff --git a/ofdm/ofdm_tx.m b/ofdm/ofdm_tx.m
index ef3f7c4..c1b7125 100644
--- a/ofdm/ofdm_tx.m
+++ b/ofdm/ofdm_tx.m
@@ -122,6 +122,6 @@ yv = real(yc) + imag(yc);
 xv = xv.' ./abs(max(xv));
 yv = yv'./max(yv);
 
-wavwrite(0.9*yv,4*fa,16,'yv.wav')
-wavwrite(0.9*[real(xv) imag(xv)],fa,16,'xv.wav')
+wavwrite(0.8*yv,4*fa,16,'yv.wav')
+wavwrite(0.8*[real(xv) imag(xv)],fa,16,'xv.wav')