diff --git a/Q1_4_song.wav b/Q1_4_song.wav
index 61ae7f2b5c7f9276eed27370bdab09c81fb6ac82..e17dfe3d29d4799de271df33429deac1f6ad7e1b 100644
Binary files a/Q1_4_song.wav and b/Q1_4_song.wav differ
diff --git a/SAR.mlx b/SAR.mlx
index 1dcab9b9645002c1a601d92d1f55c4ebf8a257a6..205a67c7af06f4a55e164834b6e65078adfd2211 100644
Binary files a/SAR.mlx and b/SAR.mlx differ
diff --git a/question_12.m b/question_12.m
index 7499e34a56ec57ff290f04981f67e119d10817a5..f8cf7d21e34044ad3841c6e3b812bbb4bae7141f 100644
--- a/question_12.m
+++ b/question_12.m
@@ -20,5 +20,6 @@ plot(f1, log(abs(X1)),'r');
 hold on
 plot(f2, log(abs(X2)),'b');
 title("spectre");
+legend()
 xlabel("fréquence en Hz");
 ylabel("10*log|X(f)|");
\ No newline at end of file
diff --git a/src/wav/single_tone_piano2.wav b/src/wav/single_tone_piano2.wav
index 609d4fbf95cd2a8b8690229d05a06d5123192de1..9e5acb3d5b0fbca6a66214152c40ded4e9285829 100644
Binary files a/src/wav/single_tone_piano2.wav and b/src/wav/single_tone_piano2.wav differ