adding disabling button until audio is ready

app.py

@@ -251,6 +251,11 @@ def output_conf():
         interactive=False,
     )
 
+def enable_convert_button(audio):
+    if audio is not None:
+        return gr.update(interactive=True)
+    return gr.update(interactive=False)
+
 
 def get_gui(theme):
     with gr.Blocks(theme=theme) as app:
@@ -267,6 +272,9 @@ def get_gui(theme):
         button_base = button_conf()
         output_base = output_conf()
 
+        aud.change(enable_convert_button, inputs=[aud], outputs=[button_base])
+
+
         button_base.click(
             run,
             inputs=[