Update app.py

app.py

@@ -220,7 +220,7 @@ def function(Textbox, Textbox2, Textbox3, Dropdown):
                     }
                     response = requests.post("https://api.carterlabs.ai/speak", headers=headers, json=voice)
                     output = response.json()
-                    output_url = output["file_url"]
+                    output_url = output["audio"]
                     def download_audio(output_url, output_file):
                         urllib.request.urlretrieve(output_url, output_file)