diff --git a/OS/01/.env.example b/OS/01/.env.example
index fa11853..d55c875 100644
--- a/OS/01/.env.example
+++ b/OS/01/.env.example
@@ -7,6 +7,11 @@ ALL_LOCAL=False
 # WHISPER_MODEL_PATH=...
 # OPENAI_API_KEY=sk-...
 
+# For TTS, we use the en_US-lessac-medium voice model by default
+# Please change the voice URL and voice name if you wish to use another voice
+export PIPER_VOICE_URL="https://huggingface.co/rhasspy/piper-voices/resolve/main/en/en_US/lessac/medium/"
+export PIPER_VOICE_NAME="en_US-lessac-medium.onnx"
+
 # If SERVER_START, this is where we'll serve the server.
 # If DEVICE_START, this is where the device expects the server to be.
 SERVER_URL=ws://localhost:8000/
@@ -22,5 +27,5 @@ STT_RUNNER=device # If server, audio will be sent over websocket.
 SERVER_EXPOSE_PUBLICALLY=False
 
 # Debug level
-# DEBUG_LEVEL=DEBUG
-DEBUG_LEVEL="INFO"
\ No newline at end of file
+# LOG_LEVEL=DEBUG
+LOG_LEVEL="INFO"
\ No newline at end of file