Fix Hathora 55 series examples, and fix Hathora missing settings field warning

examples/foundational/55zg-update-settings-hathora-tts.py

@@ -54,7 +54,7 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
 
     tts = HathoraTTSService(
         api_key=os.getenv("HATHORA_API_KEY"),
-        model="hathora-ai/polar",
+        model="hexgrad-kokoro-82m",
     )
 
     llm = OpenAILLMService(api_key=os.getenv("OPENAI_API_KEY"))
@@ -100,8 +100,8 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
         await task.queue_frames([LLMRunFrame()])
 
         await asyncio.sleep(10)
-        logger.info("Updating Hathora TTS settings: speed=1.3")
-        await task.queue_frame(TTSUpdateSettingsFrame(delta=HathoraTTSSettings(speed=1.3)))
+        logger.info("Updating Hathora TTS settings: speed=1.5")
+        await task.queue_frame(TTSUpdateSettingsFrame(delta=HathoraTTSSettings(speed=1.5)))
 
     @transport.event_handler("on_client_disconnected")
     async def on_client_disconnected(transport, client):

examples/foundational/55zs-update-settings-hathora-stt.py

@@ -52,7 +52,9 @@ transport_params = {
 async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
     logger.info(f"Starting bot")
 
-    stt = HathoraSTTService(api_key=os.getenv("HATHORA_API_KEY"), model="deepgram-nova3")
+    stt = HathoraSTTService(
+        api_key=os.getenv("HATHORA_API_KEY"), model="nvidia-parakeet-tdt-0.6b-v3"
+    )
 
     tts = CartesiaTTSService(
         api_key=os.getenv("CARTESIA_API_KEY"),

src/pipecat/services/hathora/tts.py

@@ -114,6 +114,7 @@ class HathoraTTSService(TTSService):
             settings=HathoraTTSSettings(
                 model=model,
                 voice=voice_id,
+                language=None,  # Not applicable here
                 speed=params.speed,
                 config=params.config,
             ),