diff --git a/audio_decoder.py b/audio_decoder.py
index 48fa49d..128176e 100644
--- a/audio_decoder.py
+++ b/audio_decoder.py
@@ -1,13 +1,9 @@
-import soundfile as sf
-import numpy as np
-from typing import Generator, NamedTuple
+from typing import NamedTuple
 
 import av
 
 from towhee.operator.base import Operator
-from torch_vggish import TorchVggish
 
-# from torch_vggish import TorchVggish
 
 AudioOutput = NamedTuple("Outputs", [("audio_frame", 'ndarray'), ('sample_rate', 'int'), ("TIMESTAMP", 'int')])