examples: switch homepage agent to Fish Audio with expressive mode

examples/homepage/README.md

@@ -16,7 +16,8 @@ knowledge is loaded on demand through a generated `lookup_product` tool.
 - `tests/unit/` is deterministic; `tests/evals/` runs live behavioral evaluations.
 
 The voice pipeline uses LiveKit Inference with Gemma 4 31B, Deepgram Nova-3,
-Inworld TTS, the LiveKit turn detector, and ai-coustics voice isolation.
+Fish Audio S2.1 Pro in expressive mode, the LiveKit turn detector, and
+ai-coustics voice isolation.
 
 ## Run locally
 

examples/homepage/agent.py

@@ -1,21 +1,17 @@
 import logging
-from collections.abc import AsyncIterable
 from dataclasses import dataclass
 
 from behaviors.frontend_attributes import publish_frontend_attributes
 from behaviors.user_away import check_in_when_user_away
 from dotenv import load_dotenv
-from filters.pronunciation import pronounce_livekit
 from knowledge_base import KnowledgeBase
 from prompts import prompt
 
-from livekit import rtc
 from livekit.agents import (
     Agent,
     AgentServer,
     AgentSession,
     JobContext,
-    ModelSettings,
     TurnHandlingOptions,
     cli,
     inference,
@@ -34,8 +30,9 @@ class AgentConfig:
     llm_model: str = "google/gemma-4-31b-it"
     stt_model: str = "deepgram/nova-3"
     stt_language: str = "multi"
-    tts_model: str = "inworld/inworld-tts-2"
-    tts_voice: str = "Nate"
+    tts_model: str = "fishaudio/s2.1-pro"
+    tts_voice: str = "51b44863613e405a896f7f4294c6e6d0"
+    tts_voice_label: str = "Marley"
 
 
 CONFIG = AgentConfig()
@@ -57,12 +54,6 @@ def __init__(
             tools=[knowledge_base.lookup_tool()],
         )
 
-    async def tts_node(
-        self, text: AsyncIterable[str], model_settings: ModelSettings
-    ) -> AsyncIterable[rtc.AudioFrame]:
-        async for frame in Agent.default.tts_node(self, pronounce_livekit(text), model_settings):
-            yield frame
-
     async def on_enter(self):
         await self.session.generate_reply(
             instructions=GREETING,
@@ -86,10 +77,11 @@ async def homepage_agent(ctx: JobContext):
             turn_detection=inference.TurnDetector(),
         ),
         preemptive_generation=True,
+        expressive=True,
     )
 
     check_in_when_user_away(session)
-    publish_frontend_attributes(tts_voice=CONFIG.tts_voice)
+    publish_frontend_attributes(tts_voice=CONFIG.tts_voice_label)
 
     await session.start(
         agent=Assistant(),

examples/homepage/tests/unit/test_agent_config.py

@@ -9,7 +9,8 @@
 def test_agent_config_is_the_single_source_of_runtime_identity() -> None:
     assert AgentConfig() == CONFIG
     assert CONFIG.name == "homepage_agent_v3"
-    assert CONFIG.tts_voice == "Nate"
+    assert CONFIG.tts_model == "fishaudio/s2.1-pro"
+    assert CONFIG.tts_voice_label == "Marley"
 
     with pytest.raises(FrozenInstanceError):
         CONFIG.tts_voice = "Alex"  # type: ignore[misc]