diff --git a/README.md b/README.md
index ff11d4b..88e5f2b 100644
--- a/README.md
+++ b/README.md
@@ -214,9 +214,9 @@ arecord -Dac108 -f S32_LE -r 16000 -c 4 a.wav
 arecord -Dac108 -f S32_LE -r 16000 -c 8 a.wav
 #Take care of that the captured mic audio is on the first 6 channels
 
-#It will play sound file a.wav on AC101
-aplay -D ac101 a.wav
-#Do not use -D plughw:1,0 directly except your wave file is single channel only.
+#It will play a mono channel sound file mono_to_play.wav
+#The file to play must be mono channel or else the speaker output nothing.
+aplay -D plughw:1,0 mono_to_play.wav
 
 #Doing capture && playback the same time
 arecord -D hw:1,0 -f S32_LE -r 16000 -c 8 to_be_record.wav &
diff --git a/asound_6mic.conf b/asound_6mic.conf
index 9679be4..180aac0 100644
--- a/asound_6mic.conf
+++ b/asound_6mic.conf
@@ -3,13 +3,17 @@
 
 pcm.!default {
     type asym
-    playback.pcm "ac101"
+    playback.pcm "playback"
     capture.pcm "ac108"
 }
 
 pcm.playback {
     type plug
-    slave.pcm "hw:0,0"
+    slave {
+        rate 48000
+        format S32_LE
+        pcm "hw:1,0"
+    }
 }
 
 pcm.dmixed {
@@ -25,7 +29,11 @@ pcm.ac108 {
 
 pcm.multiapps {
     type dsnoop
-    slave.pcm "hw:1,0"
+    slave {
+        rate 48000
+        format S32_LE
+        pcm "hw:1,0"
+    }
     ipc_key 666666
 }