examples: update with LLMUserAggregatorParams vad_analyzer and VADProcessor

examples/foundational/35-pattern-pair-voice-switching.py

@@ -82,24 +82,20 @@ VOICE_IDS = {
     "male": "7cf0e2b1-8daf-4fe4-89ad-f6039398f359",  # Male character voice
 }
 
-# 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,
         audio_out_enabled=True,
-        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
     ),
     "twilio": lambda: FastAPIWebsocketParams(
         audio_in_enabled=True,
         audio_out_enabled=True,
-        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
     ),
     "webrtc": lambda: TransportParams(
         audio_in_enabled=True,
         audio_out_enabled=True,
-        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
     ),
 }
 
@@ -207,6 +203,7 @@ Remember: Use narrator voice for EVERYTHING except the actual quoted dialogue.""
             user_turn_strategies=UserTurnStrategies(
                 stop=[TurnAnalyzerUserTurnStopStrategy(turn_analyzer=LocalSmartTurnAnalyzerV3())]
             ),
+            vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=0.2)),
         ),
     )