Update app.py

app.py

@@ -27,7 +27,7 @@ MODEL_NAME   = os.environ.get("PARAKEET_MODEL", "nvidia/parakeet-tdt-0.6b-v3")
 TARGET_SR    = 16_000
 BEAM_SIZE    = int(os.environ.get("PARAKEET_BEAM_SIZE", "32"))  # Increased for subtle quality gains
 OFFLINE_BATCH= int(os.environ.get("PARAKEET_BATCH", "8"))
-CHUNK_S      = float(os.environ.get("PARAKEET_CHUNK_S", "2.0"))
+CHUNK_S      = float(os.environ.get("PARAKEET_CHUNK_S", "4.0"))
 FLUSH_PAD_S  = float(os.environ.get("PARAKEET_FLUSH_PAD_S", "2.0"))
 
 # ----------------------------