diff --git a/zh/medialib/audio.md b/zh/medialib/audio.md
index b2d46e4613d3794217b153b83c7ca3fe3fb53975..7fd02055e77c5270d2982bf061d25a287c8ef9db 100644
--- a/zh/medialib/audio.md
+++ b/zh/medialib/audio.md
@@ -10,3 +10,4 @@
 
 - [class Record - 录音](audio.Record.md)
 
+- [class PCM - 音频数据编码](audio.PCM.md)