diff --git a/demo/components/audio_test.py b/demo/components/audio_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..542d9514c9fd94341cf2e7150cbd078a2dfa70c5
--- /dev/null
+++ b/demo/components/audio_test.py
@@ -0,0 +1,48 @@
+# Copyright (c) 2020 VisualDL Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# =======================================================================
+# coding=utf-8
+from visualdl import LogWriter
+import numpy as np
+import wave
+
+
+def read_audio_data(audio_path):
+    """
+    Get audio data.
+    """
+    CHUNK = 4096
+    f = wave.open(audio_path, "rb")
+    rate = f.getframerate()
+    width = f.getsampwidth()
+    channel = f.getnchannels()
+    wavdata = []
+    chunk = f.readframes(CHUNK)
+
+    while chunk:
+        data = np.frombuffer(chunk, dtype='uint8')
+        wavdata.extend(data)
+        chunk = f.readframes(CHUNK)
+    shape = [rate, width, channel]
+    return shape, wavdata
+
+
+if __name__ == '__main__':
+    with LogWriter(logdir="vdl_audio_0713") as writer:
+        audio_shape, audio_data = read_audio_data("./test.wav")
+        audio_data = np.array(audio_data)
+        writer.add_audio(tag="audio_tag",
+                         audio_array=audio_data,
+                         step=0,
+                         sample_rate=audio_shape[0])
diff --git a/demo/components/test.wav b/demo/components/test.wav
new file mode 100644
index 0000000000000000000000000000000000000000..a1170d8057d76ec1073a13089903e85332fe47ea
Binary files /dev/null and b/demo/components/test.wav differ
diff --git a/visualdl/server/data_manager.py b/visualdl/server/data_manager.py
index 349b32508f35c54ee5d832ce6fa8239bb60f007a..6dcaa58fcc85bfeed07ee7f4ed62c568788d71d1 100644
--- a/visualdl/server/data_manager.py
+++ b/visualdl/server/data_manager.py
@@ -19,7 +19,7 @@ import random
 import collections
 
 DEFAULT_PLUGIN_MAXSIZE = {
-    "scalar": 300,
+    "scalar": 1000,
     "image": 10,
     "histogram": 100,
     "embeddings": 50000,