diff --git a/extension/mic-asp-sdk/srcs/mic_asp.c b/extension/mic-asp-sdk/srcs/mic_asp.c
index 209c32a3..695c7a45 100644
--- a/extension/mic-asp-sdk/srcs/mic_asp.c
+++ b/extension/mic-asp-sdk/srcs/mic_asp.c
@@ -10,7 +10,7 @@ static PCMContainer_t g_pcmParam;
 static apr_aiwrap_t* g_aprHandle;
 static void* g_libInterface;
 static pthread_t g_voiceThread;
-static int g_isStopVoice;
+static int g_isStopVoice = 1;
 
 #define MAX_BUF_TIME 128000
 #define NUM_CHANNELS 8
@@ -26,19 +26,20 @@ static void* voiceCB(void* arg) {
     int len;
     unsigned char* pBufData = (unsigned char*)malloc(BUFFER_SIZE);
 
-    while (pBufData && g_isStopVoice) {
+    while (pBufData) {
         usleep(1000);
-        len = alsa_read_tdmin_pcm(&g_pcmParam);
-        memcpy(pBufData, g_pcmParam.data_buf, g_pcmParam.chunk_bytes);
 
-        if (len > 0 && len <= BUFFER_SIZE) {
-            _apr_aiwrap_write(g_aprHandle, pBufData, len);
+        if(g_isStopVoice == 0) {
+            len = alsa_read_tdmin_pcm(&g_pcmParam);
+            memcpy(pBufData, g_pcmParam.data_buf, g_pcmParam.chunk_bytes);
+
+            if (len > 0 && len <= BUFFER_SIZE) {
+                _apr_aiwrap_write(g_aprHandle, pBufData, len);
+            }
         }
     }
 
-    g_isStopVoice = 2;
     pthread_detach(pthread_self());
-
     return NULL;
 }
 
@@ -86,33 +87,24 @@ int mic_asp_init(MicDataCallback cb) {
         return -5;
     }
 
+    if (pthread_create(&g_voiceThread, NULL, voiceCB, NULL) == -1) {
+        return -6;
+    }
+
     return 0;
 }
 
 int mic_asp_start() {
     int err = _apr_aiwrap_start(g_aprHandle);
 
-    if(err != 0) {
-        return -1;
+    if(err == 0) {
+        g_isStopVoice = 0;
     }
 
-    g_isStopVoice = 0;
-
-    if (pthread_create(&g_voiceThread, NULL, voiceCB, NULL) == -1) {
-        return -2;
-    }
-
-    return 0;
+    return err;
 }
 
 int mic_asp_stop() {
     g_isStopVoice = 1;
-
-    while(g_isStopVoice != 2) {
-        usleep(1000);
-    }
-
-    g_isStopVoice = 0;
-
     return _apr_aiwrap_stop(g_aprHandle);
 }
\ No newline at end of file