Update app.py

app.py

@@ -166,6 +166,9 @@ def _tts_to_mp3_file(text: str) -> tuple[str, int]:
         voice_id=ELEVEN_VOICE_ID,
         model_id=ELEVEN_MODEL_ID,
         output_format=ELEVEN_OUTPUT_FORMAT,
+        voice_settings=VoiceSettings(
+            speed=0.8, 
+        ),
     )
 
     with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_out: