Script fixes

app.py

@@ -82,8 +82,7 @@ class AudioFeature:
         self.y = None
         self.y_harm, self.y_perc = None, None
 
-    def detect_key(self, chroma_vals: np.ndarray) -> Tuple[str, str]:
-        """Detect the key and mode (major or minor) of the audio segment."""
+    def detect_key(self, chroma_vals: np.ndarray):
         note_names = ['C', 'C#', 'D', 'D#', 'E',
                       'F', 'F#', 'G', 'G#', 'A', 'A#', 'B']
         major_profile = np.array(
@@ -225,7 +224,7 @@ def positional_encoding(position: int, d_model: int) -> np.ndarray:
     return np.concatenate([np.sin(angle_rads[:, 0::2]), np.cos(angle_rads[:, 1::2])], axis=-1)
 
 
-def apply_hierarchical_positional_encoding(segments: List[np.ndarray]) -> List[np.ndarray]:
+def apply_hierarchical_positional_encoding(segments):
     """Apply positional encoding at the meter and frame levels to a list of segments."""
     n_features = segments[0].shape[1]
     measure_level_encodings = positional_encoding(len(segments), n_features)