update

app.py

@@ -34,5 +34,5 @@ with gr.Blocks() as demo:
         text = gr.Textbox(label="Text to speak", value='The field of text to speech has seen rapid development recently')
     btn = gr.Button('Synthesize', variant='primary')
     aud = gr.Audio(interactive=False)
-    btn.click(synthesize, inputs=[language, speaker, text, speed], outputs=[aud])
+    btn.click(synthesize, inputs=[speaker, text, speed], outputs=[aud])
 demo.queue(api_open=False, default_concurrency_limit=10).launch(show_api=False)