diff --git a/vall_e/__main__.py b/vall_e/__main__.py
index b979b04..8f96d3e 100755
--- a/vall_e/__main__.py
+++ b/vall_e/__main__.py
@@ -22,7 +22,7 @@ def main():
 	parser.add_argument("--max-nar-levels", type=int, default=7)
 
 	parser.add_argument("--ar-temp", type=float, default=0.0)
-	parser.add_argument("--nar-temp", type=float, default=0.01)
+	parser.add_argument("--nar-temp", type=float, default=0.0)
 	parser.add_argument("--min-ar-temp", type=float, default=-1.0)
 	parser.add_argument("--min-nar-temp", type=float, default=-1.0)
 	parser.add_argument("--input-prompt-length", type=float, default=3.0)
diff --git a/vall_e/inference.py b/vall_e/inference.py
index aef6b02..b5817db 100755
--- a/vall_e/inference.py
+++ b/vall_e/inference.py
@@ -270,6 +270,9 @@ class TTS():
 
 			return text_list[0]
 
+		# validate settings here
+		if not references and ar_temp < 0.5:
+			_logger.warning(f'Audio-promptless inferencing fails with low AR temperatures.')
 
 		for line in lines:
 			if out_path is None: