attempt 6 at fps issue

app.py

@@ -12,7 +12,7 @@ def extract_waveform_animation(audio_file, window_seconds=5):
     FPS = 30
     fig, ax = plt.subplots()
     line, = ax.plot([], [], lw=2)
-    window_length = int(window_seconds * sr * FPS)
+    window_length = int(window_seconds * sr)
     
     # Initialize with first window
     first_window = y[:window_length]