fixed function

app.py

@@ -10,8 +10,9 @@ import parselmouth
 
 def get_pitch(audio_file):
     sound = parselmouth.Sound(audio_file)
-    pitch = sound.to_pitch()
-    return pitch
+    pitch = call(sound, "To Pitch", 0.0, 75, 500)
+    pitch_values = pitch.selected_array['frequency']
+    return pitch_values
 
 demo = gr.Interface(fn=get_pitch, inputs="audio", outputs="text")
 demo.launch()