diff --git a/vall_e/emb/qnt.py b/vall_e/emb/qnt.py
index c6f712a..845c0b1 100755
--- a/vall_e/emb/qnt.py
+++ b/vall_e/emb/qnt.py
@@ -20,32 +20,29 @@ from tqdm import tqdm
 
 from torch.nn.utils.rnn import pad_sequence
 
+AVAILABLE_AUDIO_BACKENDS = []
 try:
 	from .codecs.encodec import *
-	cfg.inference.audio_backends["encodec"] = True
+	AVAILABLE_AUDIO_BACKENDS.append("encodec")
 except Exception as e:
-	cfg.inference.audio_backends["encodec"] = False # e
 	_logger.warning(str(e))
 
 try:
 	from .codecs.vocos import *
-	cfg.inference.audio_backends["vocos"] = True
+	AVAILABLE_AUDIO_BACKENDS.append("vocos")
 except Exception as e:
-	cfg.inference.audio_backends["vocos"] = False # e
 	_logger.warning(str(e))
 
 try:
 	from .codecs.dac import *
-	cfg.inference.audio_backends["dac"] = True
+	AVAILABLE_AUDIO_BACKENDS.append("dac")
 except Exception as e:
-	cfg.inference.audio_backends["dac"] = False # e
 	_logger.warning(str(e))
 
 try:
 	from .codecs.nemo import *
-	cfg.inference.audio_backends["nemo"] = True
+	AVAILABLE_AUDIO_BACKENDS.append("nemo")
 except Exception as e:
-	cfg.inference.audio_backends["nemo"] = False # e
 	_logger.warning(str(e))
 
 @cache
diff --git a/vall_e/inference.py b/vall_e/inference.py
index 6cdf09f..1639b4a 100644
--- a/vall_e/inference.py
+++ b/vall_e/inference.py
@@ -14,7 +14,7 @@ from pathlib import Path
 from tqdm import tqdm, trange
 
 from .emb import g2p, qnt
-from .emb.qnt import trim, trim_random, unload_model, repeat_extend_audio
+from .emb.qnt import trim, trim_random, unload_model, repeat_extend_audio, AVAILABLE_AUDIO_BACKENDS
 from .emb.transcribe import transcribe
 
 from .utils import to_device, set_seed, clamp, ml
@@ -62,7 +62,7 @@ class TTS():
 		cfg.dataset.use_hdf5 = False # could use cfg.load_hdf5(), but why would it ever need to be loaded for inferencing
 
 		# fallback to encodec if no vocos
-		if cfg.audio_backend == "vocos" and not cfg.inference.audio_backends.get("vocos", False):
+		if cfg.audio_backend == "vocos" and "vocos" not in AVAILABLE_AUDIO_BACKENDS:
 			_logger.warning("Vocos requested but not available, falling back to Encodec...")
 			cfg.set_audio_backend(cfg.audio_backend)