diff --git a/components/drivers/audio/audio.c b/components/drivers/audio/audio.c
index 14dddb38ea9803cdb3f1610c1af42dcb8f738f19..6a5ebc87415fcfae2ba586470c0ba9c94c11c506 100644
--- a/components/drivers/audio/audio.c
+++ b/components/drivers/audio/audio.c
@@ -105,8 +105,6 @@ static rt_err_t _audio_dev_init(struct rt_device *dev)
 
 static rt_err_t _audio_dev_open(struct rt_device *dev, rt_uint16_t oflag)
 {
-    rt_err_t result = RT_EOK;
-    rt_base_t level;
     struct rt_audio_device *audio;
 
     RT_ASSERT(dev != RT_NULL);
@@ -159,7 +157,6 @@ static rt_err_t _audio_dev_open(struct rt_device *dev, rt_uint16_t oflag)
 
             //init pipe for record
             {
-                rt_size_t size = CFG_AUDIO_RECORD_PIPE_SIZE;
                 rt_uint8_t *buf = rt_malloc(CFG_AUDIO_RECORD_PIPE_SIZE);
 
                 if (buf == RT_NULL)
@@ -170,7 +167,7 @@ static rt_err_t _audio_dev_open(struct rt_device *dev, rt_uint16_t oflag)
                     return -RT_ENOMEM;
                 }
                 
-                rt_audio_pipe_init(&audio_pipe, "recpipe", RT_PIPE_FLAG_FORCE_WR | RT_PIPE_FLAG_BLOCK_RD, buf,
+                rt_audio_pipe_init(&audio_pipe, "recpipe", (rt_int32_t)(RT_PIPE_FLAG_FORCE_WR | RT_PIPE_FLAG_BLOCK_RD), buf,
                              CFG_AUDIO_RECORD_PIPE_SIZE);
             }
 
@@ -536,8 +533,6 @@ void rt_audio_tx_complete(struct rt_audio_device *audio, rt_uint8_t *pbuf)
 
 void rt_audio_rx_done(struct rt_audio_device *audio, rt_uint8_t *pbuf, rt_size_t len)
 {
-    rt_err_t result = RT_EOK;
-
     //save data to record pipe
     rt_device_write(RT_DEVICE(RT_DEVICE(&audio_pipe)), 0, pbuf, len);
 
diff --git a/components/drivers/audio/audio_pipe.c b/components/drivers/audio/audio_pipe.c
index a372ae0625f5ccfa6019d1a05754150d1434e208..4df9fd8a49bba87b7ced38a5a3853653f12be717 100644
--- a/components/drivers/audio/audio_pipe.c
+++ b/components/drivers/audio/audio_pipe.c
@@ -213,7 +213,7 @@ const static struct rt_device_ops audio_pipe_ops =
  */
 rt_err_t rt_audio_pipe_init(struct rt_audio_pipe *pipe,
                       const char *name,
-                      enum rt_audio_pipe_flag flag,
+                      rt_int32_t flag,
                       rt_uint8_t *buf,
                       rt_size_t size)
 {
@@ -258,7 +258,7 @@ rt_err_t rt_audio_pipe_detach(struct rt_audio_pipe *pipe)
 }
 
 #ifdef RT_USING_HEAP
-rt_err_t rt_audio_pipe_create(const char *name, enum rt_audio_pipe_flag flag, rt_size_t size)
+rt_err_t rt_audio_pipe_create(const char *name, rt_int32_t flag, rt_size_t size)
 {
     rt_uint8_t *rb_memptr = RT_NULL;
     struct rt_audio_pipe *pipe = RT_NULL;
diff --git a/components/drivers/audio/audio_pipe.h b/components/drivers/audio/audio_pipe.h
index c34f72b019b8fae467eb7453a27afdc8b06110ca..85a3eb17933f01aec601c482be63aaec6bc8b22c 100644
--- a/components/drivers/audio/audio_pipe.h
+++ b/components/drivers/audio/audio_pipe.h
@@ -50,7 +50,7 @@ struct rt_audio_pipe
     /* ring buffer in pipe device */
     struct rt_ringbuffer ringbuffer;
 
-    enum rt_audio_pipe_flag flag;
+    rt_int32_t flag;
 
     /* suspended list */
     rt_list_t suspended_read_list;
@@ -64,12 +64,12 @@ struct rt_audio_pipe
 
 rt_err_t rt_audio_pipe_init(struct rt_audio_pipe *pipe,
                       const char *name,
-                      enum rt_audio_pipe_flag flag,
+                      rt_int32_t flag,
                       rt_uint8_t *buf,
                       rt_size_t size);
 rt_err_t rt_audio_pipe_detach(struct rt_audio_pipe *pipe);
 #ifdef RT_USING_HEAP
-rt_err_t rt_audio_pipe_create(const char *name, enum rt_audio_pipe_flag flag, rt_size_t size);
+rt_err_t rt_audio_pipe_create(const char *name, rt_int32_t flag, rt_size_t size);
 void rt_audio_pipe_destroy(struct rt_audio_pipe *pipe);
 #endif
 #endif