Update app.py

app.py

@@ -38,12 +38,11 @@ def audio_callback(frame):
 webrtc_ctx = webrtc_streamer(
     key="audio-only",
     mode=WebRtcMode.SENDRECV,
-    client_settings=ClientSettings(
-        media_stream_constraints={
-            "audio": True,
-            "video": False
-        }
-    ),
+    rtc_configuration={"iceServers": [{"urls": ["stun:stun1.l.google.com:19302"]}]},
+    media_stream_constraints={
+        "audio": True,
+        "video": False
+    },
     audio_frame_callback=audio_callback
 )