Update app.py

app.py

@@ -95,7 +95,7 @@ descr_txt = "Demo of BatDetect2 deep learning-based bat echolocation call detect
 
 gr.Interface(
     fn = make_prediction,
-    inputs = [gr.Audio(source="upload", type="filepath", optional=True), 
+    inputs = [gr.Audio(sources=["upload"], type="filepath", optional=True), 
               gr.Dropdown([0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9])],
     outputs = [df, gr.Image(label="Visualisation")],
     theme = "huggingface",