Update app.py

app.py

@@ -73,8 +73,8 @@ def chat():
     communicate = edge_tts.Communicate(
         clean,
         voice,
-        rate="-20%",
-        pitch="-10Hz"
+        rate="-40%",
+        pitch="-30Hz"
     )
     audio_chunks = []
     async def synth():