Update app.py

app.py

@@ -61,7 +61,7 @@ def wav_bytes_from_spectrogram_image(image):
     return wav_bytes
 
 def spectrogram_from_image(
-    image: Image.Image, max_volume: float = 50, power_for_image: float = 0.25
+    image, max_volume: float = 50, power_for_image: float = 0.25
 ) -> np.ndarray:
     """
     Compute a spectrogram magnitude array from a spectrogram image.