diff --git a/en/medialib/audio.Record.md b/en/medialib/audio.Record.md
index 50ae72448ba05f629602b8892b9ed2334e93f6bc..a75c22a70cde834ac70655d53e2148b97526605b 100644
--- a/en/medialib/audio.Record.md
+++ b/en/medialib/audio.Record.md
@@ -93,7 +93,9 @@ Creates a record object.
 audio.start(file_name,seconds)
 ```
 
-This method starts recording.
+This method starts recording, recording data stored as files.
+
+> When recording files in AMR and WAV formats using this method, default sampling rate 8000. When recording files in MP3 format, default sampling rate 22050.
 
 **Parameter:**
 
diff --git a/zh/medialib/audio.Record.md b/zh/medialib/audio.Record.md
index dec73c139153726011d09b4d738a1b9dbd870708..d3160b99cdb08fec7be112f78c60eafb1d9349ee 100644
--- a/zh/medialib/audio.Record.md
+++ b/zh/medialib/audio.Record.md
@@ -48,7 +48,9 @@ class audio.Record(device)
 Record.start(file_name,seconds)
 ```
 
-该方法用于开始录音。
+该方法用于开始录音，录音数据储存为文件。
+
+> 注：该方法录制AMR、WAV格式的文件时，默认采样率为8000，录制MP3格式时，默认采样率为22050。
 
 **参数描述：**