Update app.py

app.py

@@ -221,7 +221,7 @@ with gr.Blocks(theme=gr.themes.Soft()) as interface:
         with gr.Column():
             speaker1_voice = gr.Dropdown(
                 choices=available_voices,
-                value=next((v for v in available_voices if "Christopher" in v), available_voices[0]),
+                value=next((v for v in available_voices if "Andrew" in v), available_voices[0]),
                 label="First Speaker Voice",
                 info="Select voice for the first speaker"
             )