diff --git a/src/example_with_wave_file.m b/src/example_with_wave_file.m
index e288ffce5280fbee6268f915d49b999fd7d6082e..efdc07d6b29d048580f5182ca3150736055b5ff5 100644
--- a/src/example_with_wave_file.m
+++ b/src/example_with_wave_file.m
@@ -1,12 +1,7 @@
-%% this is a simple example to read and play a wave file with matlab
-
-% set a string variable to a wave filename we want to open:
-toneFileName = "wav/single_tone_piano1.wav";
-% read the content of the wave file:
-[data,fe] = audioread(toneFileName);
-% data is a matrix with 2 columns if the sound is stereo; keep the mono to ease further processing
-data = data(:,1); 
-% get the number of sample in vector data
-N = length(data);
-% play the sound in the audio output:
-soundsc(data,fe);
\ No newline at end of file
+[x_piano, Fe] = audioread("synthetic_piano_ADSR.wav");
+x_piano = x_piano(:,1); % mono
+delay_time = 0.25;
+g = 0.9;
+K = 10;
+y_filtre = effet_delay_filtre(x_piano, delay_time, g, K, Fe);
+soundsc(y_filtre, Fe);
diff --git a/src/wav/single_tone_guitar_nylon_string_a2.wav b/src/wav/single_tone_guitar_nylon_string_a2.wav
deleted file mode 100644
index b36d25495e30cebbaac2cb248e629bddf8bdb2bc..0000000000000000000000000000000000000000
Binary files a/src/wav/single_tone_guitar_nylon_string_a2.wav and /dev/null differ
diff --git a/src/wav/single_tone_piano1.wav b/src/wav/single_tone_piano1.wav
deleted file mode 100644
index af184b832ca44b0a28441e62e7ade80f617c00e5..0000000000000000000000000000000000000000
Binary files a/src/wav/single_tone_piano1.wav and /dev/null differ