Update app.py

app.py

@@ -1,15 +1,16 @@
 import gradio as gr
 
-def identity(input):
-    return input
+def identity(audio):
+    return audio
 
 with gr.Blocks() as demo:
     with gr.Row():
         with gr.Column():
             audio_in = gr.Audio(sources=["microphone"], type="filepath")
-            run_button = gr.Button("Generate Audio", variant="primary")
+            run_button = gr.Button("Generate audio")
         with gr.Column():
-            audio_out = gr.Audio(type="filepath", elem_id="audio_out")
+            audio_out = gr.Audio(type="filepath")
+
     run_button.click(fn=identity, inputs=[audio_in], outputs=[audio_out])
 
 demo.launch()