diff --git a/rk3308/oem/AudioTest/playback-silence-48k-16bit-2ch.wav b/rk3308/oem/AudioTest/playback-silence-48k-16bit-2ch.wav
new file mode 100755
index 0000000..48cdf63
Binary files /dev/null and b/rk3308/oem/AudioTest/playback-silence-48k-16bit-2ch.wav differ
diff --git a/rk3308/oem/AudioTest/playback-sine-1khz-48k-16bit-2ch.wav b/rk3308/oem/AudioTest/playback-sine-1khz-48k-16bit-2ch.wav
new file mode 100755
index 0000000..a64ccce
Binary files /dev/null and b/rk3308/oem/AudioTest/playback-sine-1khz-48k-16bit-2ch.wav differ
diff --git a/rk3308/oem/AudioTest/playback_record_.sh b/rk3308/oem/AudioTest/playback_record_.sh
new file mode 100755
index 0000000..ddf20f7
--- /dev/null
+++ b/rk3308/oem/AudioTest/playback_record_.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+#example:./amic-loopback-no-vad.sh 16000(record rate) S16_LE(record format) hw:0,0(playback hardward)
+#							 7(total times) /tmp/playback-sine-1khz-48k-16bit-2ch.wav(playback file)
+rm /tmp/playback_record/ -rf
+mkdir /tmp/playback_record
+arecord -D hw:0,0 -c 8 -r $1 -d 10000 -f "$2"  --period-size 1024 --buffer-size 65536 -f S16_LE /tmp/playback_record/record_playback.wav &    
+for((i=1;i<=$4 ;i++));  
+do
+j=$(expr $i % 9 + 1);   
+echo $j;
+aplay -D $3 $5 -d $j &
+if [ $j -eq 5 ]
+then
+	killall arecord 
+	killall aplay
+	sleep 3
+	aplay -D $3 $5 -d 100 &
+	sleep 1
+	echo "restart record..."
+	arecord -D hw:0,0 -c 8 -r $1 -d 10000 -f "$2"  --period-size 1024 --buffer-size 65536 -f S16_LE /tmp/playback_record/playback_record.wav &
+fi
+sleep $j
+killall aplay
+sleep 1
+done 
+echo "end record..." 
+killall arecord 
\ No newline at end of file
diff --git a/rk3308/oem/AudioTest/readme.txt b/rk3308/oem/AudioTest/readme.txt
index f8ada09..7881237 100755
--- a/rk3308/oem/AudioTest/readme.txt
+++ b/rk3308/oem/AudioTest/readme.txt
@@ -4,4 +4,7 @@ the format cmd
 1, arecord.sh 2(µ¥Î»S)
 2, ChangeVolume.sh 2mic_loopback 3(ÉùµÀÊý)
 3, LoopbackTest.sh 2mic_loopback 3
-4, LoopbackTest1.sh 2mic_loopback 3
\ No newline at end of file
+4, LoopbackTest1.sh 2mic_loopback 3
+
+5  amic-loopback-no-vad.sh 16000(record rate) S16_LE(record format) hw:0,0(playback hardward)
+#							 7(total times) /tmp/playback-sine-1khz-48k-16bit-2ch.wav(playback file)
\ No newline at end of file