diff --git a/src/.env.example b/src/.env.example
index 64320bc..f7c789d 100644
--- a/src/.env.example
+++ b/src/.env.example
@@ -8,3 +8,6 @@ APP_ID=683ea1bc86197e19f71fc1ae
 DELETE_SESSION_URL=http://127.0.0.1:3030/api/core/chat/delHistory?chatId={chatId}&appId={appId}
 DELETE_CHAT_URL=http://127.0.0.1:3030/api/core/chat/item/delete?contentId={contentId}&chatId={chatId}&appId={appId}
 GET_CHAT_RECORDS_URL=http://127.0.0.1:3030/api/core/chat/getPaginationRecords
+
+# Voice demo (Pipecat /ws-product). Relative to project root, or an absolute path.
+VOICE_CONFIG=config/voice.json
diff --git a/src/voice/config.py b/src/voice/config.py
index 327e47b..0211f65 100644
--- a/src/voice/config.py
+++ b/src/voice/config.py
@@ -1,11 +1,30 @@
 from __future__ import annotations
 
 import json
+import os
 from dataclasses import dataclass, field
 from pathlib import Path
 
+from dotenv import load_dotenv
+
+load_dotenv()
+
 PROJECT_ROOT = Path(__file__).resolve().parent.parent.parent
-DEFAULT_VOICE_CONFIG = PROJECT_ROOT / "config" / "voice.json"
+DEFAULT_VOICE_CONFIG_REL = "config/voice.json"
+
+
+def resolve_voice_config_path() -> Path:
+    """Return the voice config path from VOICE_CONFIG or the default."""
+    configured = os.getenv("VOICE_CONFIG", DEFAULT_VOICE_CONFIG_REL).strip()
+    if not configured:
+        configured = DEFAULT_VOICE_CONFIG_REL
+    path = Path(configured)
+    if not path.is_absolute():
+        path = PROJECT_ROOT / path
+    return path
+
+
+DEFAULT_VOICE_CONFIG = resolve_voice_config_path()
 
 
 @dataclass(frozen=True)
@@ -143,7 +162,7 @@ class EngineConfig:
 
 
 def load_config(path: str | Path | None = None) -> EngineConfig:
-    config_path = Path(path) if path is not None else DEFAULT_VOICE_CONFIG
+    config_path = Path(path) if path is not None else resolve_voice_config_path()
     if not config_path.is_absolute():
         config_path = PROJECT_ROOT / config_path
     data = json.loads(config_path.read_text(encoding="utf-8"))
diff --git a/src/voice/routes.py b/src/voice/routes.py
index 7b21621..e60eb50 100644
--- a/src/voice/routes.py
+++ b/src/voice/routes.py
@@ -8,7 +8,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
 from loguru import logger
 
-from .config import DEFAULT_VOICE_CONFIG, EngineConfig, load_config
+from .config import EngineConfig, load_config, resolve_voice_config_path
 from .pipeline import run_product_voice_pipeline
 
 PROJECT_ROOT = Path(__file__).resolve().parent.parent.parent
@@ -19,7 +19,12 @@ router = APIRouter(tags=["voice"])
 
 @lru_cache(maxsize=1)
 def get_voice_config() -> EngineConfig:
-    return load_config(DEFAULT_VOICE_CONFIG)
+    return load_config()
+
+
+@lru_cache(maxsize=1)
+def get_voice_config_path() -> Path:
+    return resolve_voice_config_path()
 
 
 def _normalize_mount_path(path: str) -> str:
@@ -39,6 +44,7 @@ async def voice_health() -> dict[str, object]:
     )
     return {
         "status": "healthy",
+        "config": str(get_voice_config_path()),
         "protocols": {
             "/ws-product": "va.ws.v1.json_base64",
         },
@@ -62,12 +68,14 @@ async def product_websocket_endpoint(websocket: WebSocket) -> None:
 
 def register_voice(app: FastAPI) -> None:
     """Mount voice websocket routes and optional browser demo static files."""
-    if not DEFAULT_VOICE_CONFIG.exists():
-        logger.warning(f"Voice config not found at {DEFAULT_VOICE_CONFIG}; voice demo disabled")
+    voice_config_path = get_voice_config_path()
+    if not voice_config_path.exists():
+        logger.warning(f"Voice config not found at {voice_config_path}; voice demo disabled")
         return
 
     config = get_voice_config()
     app.include_router(router)
+    logger.info(f"Voice config loaded from {voice_config_path}")
 
     if config.server.cors_origins:
         app.add_middleware(