Update app.py

app.py

@@ -279,7 +279,7 @@ with gr.Blocks(css=css, theme=gr.themes.Soft()) as demo:
                 demo_selector = gr.Dropdown(
                     label="Select Test Demo",
                     choices=[name for name, _, _ in demo_audio_files],
-                    value="Demo Pair 1"
+                    value="Test Demo 2"
                 )
                 extract_button = gr.Button("Extract", scale=1)