examples: update with LLMUserAggregatorParams vad_analyzer and VADProcessor

examples/foundational/39-mcp-stdio.py

@@ -112,9 +112,8 @@ def open_image_output_filter(output: str):
     print(f"🖼️ link to high resolution artwork: {text_to_print}")
 
 
-# We store functions so objects (e.g. SileroVADAnalyzer) don't get
-# instantiated. The function will be called when the desired transport gets
-# selected.
+# We use lambdas to defer transport parameter creation until the transport
+# type is selected at runtime.
 transport_params = {
     "daily": lambda: DailyParams(
         audio_in_enabled=True,
@@ -122,7 +121,6 @@ transport_params = {
         video_out_enabled=True,
         video_out_width=1024,
         video_out_height=1024,
-        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
     ),
     "webrtc": lambda: TransportParams(
         audio_in_enabled=True,
@@ -130,7 +128,6 @@ transport_params = {
         video_out_enabled=True,
         video_out_width=1024,
         video_out_height=1024,
-        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
     ),
 }
 
@@ -200,6 +197,7 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
                         TurnAnalyzerUserTurnStopStrategy(turn_analyzer=LocalSmartTurnAnalyzerV3())
                     ]
                 ),
+                vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
             ),
         )