diff --git a/audio/tests/features/base.py b/audio/tests/features/base.py
index d183b72ad..3bb1d1dde 100644
--- a/audio/tests/features/base.py
+++ b/audio/tests/features/base.py
@@ -37,7 +37,7 @@ class FeatTest(unittest.TestCase):
         self.waveform, self.sr = load(os.path.abspath(os.path.basename(url)))
         self.waveform = self.waveform.astype(
             np.float32
-        )  # paddlespeech.s2t.transform.spectrogram only supports float32 
+        )  # paddlespeech.audio.transform.spectrogram only supports float32
         dim = len(self.waveform.shape)
 
         assert dim in [1, 2]
diff --git a/audio/tests/features/test_istft.py b/audio/tests/features/test_istft.py
index 9cf8cdd65..ea1ee5cb6 100644
--- a/audio/tests/features/test_istft.py
+++ b/audio/tests/features/test_istft.py
@@ -18,8 +18,8 @@ import paddle
 from paddleaudio.functional.window import get_window
 
 from .base import FeatTest
-from paddlespeech.s2t.transform.spectrogram import IStft
-from paddlespeech.s2t.transform.spectrogram import Stft
+from paddlespeech.audio.transform.spectrogram import IStft
+from paddlespeech.audio.transform.spectrogram import Stft
 
 
 class TestIstft(FeatTest):
diff --git a/audio/tests/features/test_log_melspectrogram.py b/audio/tests/features/test_log_melspectrogram.py
index 7d5680387..b2765d3be 100644
--- a/audio/tests/features/test_log_melspectrogram.py
+++ b/audio/tests/features/test_log_melspectrogram.py
@@ -18,7 +18,7 @@ import paddle
 import paddleaudio
 
 from .base import FeatTest
-from paddlespeech.s2t.transform.spectrogram import LogMelSpectrogram
+from paddlespeech.audio.transform.spectrogram import LogMelSpectrogram
 
 
 class TestLogMelSpectrogram(FeatTest):
diff --git a/audio/tests/features/test_spectrogram.py b/audio/tests/features/test_spectrogram.py
index 5fe5afee1..6f4609632 100644
--- a/audio/tests/features/test_spectrogram.py
+++ b/audio/tests/features/test_spectrogram.py
@@ -18,7 +18,7 @@ import paddle
 import paddleaudio
 
 from .base import FeatTest
-from paddlespeech.s2t.transform.spectrogram import Spectrogram
+from paddlespeech.audio.transform.spectrogram import Spectrogram
 
 
 class TestSpectrogram(FeatTest):
diff --git a/audio/tests/features/test_stft.py b/audio/tests/features/test_stft.py
index 58792ffe2..9511a2926 100644
--- a/audio/tests/features/test_stft.py
+++ b/audio/tests/features/test_stft.py
@@ -18,7 +18,7 @@ import paddle
 from paddleaudio.functional.window import get_window
 
 from .base import FeatTest
-from paddlespeech.s2t.transform.spectrogram import Stft
+from paddlespeech.audio.transform.spectrogram import Stft
 
 
 class TestStft(FeatTest):
diff --git a/docs/tutorial/asr/tutorial_transformer.ipynb b/docs/tutorial/asr/tutorial_transformer.ipynb
index dc3030061..77aed4bf8 100644
--- a/docs/tutorial/asr/tutorial_transformer.ipynb
+++ b/docs/tutorial/asr/tutorial_transformer.ipynb
@@ -236,8 +236,8 @@
     "warnings.filterwarnings('ignore')\n",
     "\n",
     "from yacs.config import CfgNode\n",
-    "from paddlespeech.s2t.transform.spectrogram import LogMelSpectrogramKaldi\n",
-    "from paddlespeech.s2t.transform.cmvn import GlobalCMVN\n",
+    "from paddlespeech.audio.transform.spectrogram import LogMelSpectrogramKaldi\n",
+    "from paddlespeech.audio.transform.cmvn import GlobalCMVN\n",
     "from paddlespeech.s2t.frontend.featurizer.text_featurizer import TextFeaturizer\n",
     "from paddlespeech.s2t.models.u2 import U2Model\n",
     "\n",
diff --git a/utils/apply-cmvn.py b/utils/apply-cmvn.py
index cf91bdfcd..fa69ff8e0 100755
--- a/utils/apply-cmvn.py
+++ b/utils/apply-cmvn.py
@@ -6,7 +6,7 @@ import kaldiio
 import numpy
 from distutils.util import strtobool
 
-from paddlespeech.s2t.transform.cmvn import CMVN
+from paddlespeech.audio.transform.cmvn import CMVN
 from paddlespeech.s2t.utils.cli_readers import file_reader_helper
 from paddlespeech.s2t.utils.cli_utils import get_commandline_args
 from paddlespeech.s2t.utils.cli_utils import is_scipy_wav_style