introduce PipelineParams audio input/output sample rates

examples/websocket-server/bot.py

@@ -17,6 +17,7 @@ from pipecat.pipeline.pipeline import Pipeline
 from pipecat.pipeline.runner import PipelineRunner
 from pipecat.pipeline.task import PipelineParams, PipelineTask
 from pipecat.processors.aggregators.openai_llm_context import OpenAILLMContext
+from pipecat.serializers.protobuf import ProtobufFrameSerializer
 from pipecat.services.cartesia import CartesiaTTSService
 from pipecat.services.deepgram import DeepgramSTTService
 from pipecat.services.openai import OpenAILLMService
@@ -80,7 +81,7 @@ class SessionTimeoutHandler:
 async def main():
     transport = WebsocketServerTransport(
         params=WebsocketServerParams(
-            audio_out_sample_rate=16000,
+            serializer=ProtobufFrameSerializer(),
             audio_out_enabled=True,
             add_wav_header=True,
             vad_enabled=True,
@@ -97,7 +98,6 @@ async def main():
     tts = CartesiaTTSService(
         api_key=os.getenv("CARTESIA_API_KEY"),
         voice_id="79a125e8-cd45-4c13-8a67-188112f4dd22",  # British Lady
-        sample_rate=16000,
     )
 
     messages = [
@@ -122,7 +122,12 @@ async def main():
         ]
     )
 
-    task = PipelineTask(pipeline, params=PipelineParams(allow_interruptions=True))
+    task = PipelineTask(
+        pipeline,
+        params=PipelineParams(
+            audio_in_sample_rate=16000, audio_out_sample_rate=16000, allow_interruptions=True
+        ),
+    )
 
     @transport.event_handler("on_client_connected")
     async def on_client_connected(transport, client):