diff --git a/audio/Kconfig b/audio/Kconfig
index 941b9d2f88..251b54c7a7 100644
--- a/audio/Kconfig
+++ b/audio/Kconfig
@@ -11,6 +11,12 @@ config AUDIO
 
 if AUDIO
 
+config AUDIO_COMP
+	bool "Support audio composition"
+	default n
+	---help---
+		Composite several lower level audio devices into big one.
+
 config AUDIO_MULTI_SESSION
 	bool "Support multiple sessions"
 	default n
diff --git a/audio/Makefile b/audio/Makefile
index 42ee4ea319..fef3f261c8 100644
--- a/audio/Makefile
+++ b/audio/Makefile
@@ -45,6 +45,10 @@ ASRCS =
 CSRCS = audio.c
 VPATH = .
 
+ifeq ($(CONFIG_AUDIO_COMP),y)
+  CSRCS += audio_comp.c
+endif
+
 # Include support for various drivers.  Each Make.defs file will add its
 # files to the source file list, add its DEPPATH info, and will add
 # the appropriate paths to the VPATH variable
diff --git a/audio/audio_comp.c b/audio/audio_comp.c
new file mode 100644
index 0000000000..14b77a7370
--- /dev/null
+++ b/audio/audio_comp.c
@@ -0,0 +1,1001 @@
+/****************************************************************************
+ * audio/audio_comp.c
+ *
+ * A general audio driver to composite other lower level audio driver.
+ *
+ *   Copyright (C) 2018 Pinecone Inc. All rights reserved.
+ *   Author:  Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdarg.h>
+
+#include <nuttx/audio/audio.h>
+#include <nuttx/audio/audio_comp.h>
+#include <nuttx/kmalloc.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/* This structure describes the internal state of the audio composite */
+
+struct audio_comp_priv_s
+{
+  /* This is is our appearance to the outside world. This *MUST* be the
+   * first element of the structure so that we can freely cast between
+   * types struct audio_lowerhalf and struct audio_comp_dev_s.
+   */
+
+  struct audio_lowerhalf_s export;
+
+  /* This is the contained, low-level audio device array and count. */
+
+  FAR struct audio_lowerhalf_s **lower;
+  int count;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static int audio_comp_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
+                              FAR struct audio_caps_s *caps);
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_configure(FAR struct audio_lowerhalf_s *dev,
+                                FAR void *session,
+                                FAR const struct audio_caps_s *caps);
+#else
+static int audio_comp_configure(FAR struct audio_lowerhalf_s *dev,
+                                FAR const struct audio_caps_s *caps);
+#endif
+static int audio_comp_shutdown(FAR struct audio_lowerhalf_s *dev);
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_start(FAR struct audio_lowerhalf_s *dev,
+                            FAR void *session);
+#else
+static int audio_comp_start(FAR struct audio_lowerhalf_s *dev);
+#endif
+#ifndef CONFIG_AUDIO_EXCLUDE_STOP
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_stop(FAR struct audio_lowerhalf_s *dev,
+                           FAR void *session);
+#else
+static int audio_comp_stop(FAR struct audio_lowerhalf_s *dev);
+#endif
+#endif
+#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_pause(FAR struct audio_lowerhalf_s *dev,
+                            FAR void *session);
+static int audio_comp_resume(FAR struct audio_lowerhalf_s *dev,
+                             FAR void *session);
+#else
+static int audio_comp_pause(FAR struct audio_lowerhalf_s *dev);
+static int audio_comp_resume(FAR struct audio_lowerhalf_s *dev);
+#endif
+#endif
+static int audio_comp_allocbuffer(FAR struct audio_lowerhalf_s *dev,
+                                  FAR struct audio_buf_desc_s *bufdesc);
+static int audio_comp_freebuffer(FAR struct audio_lowerhalf_s *dev,
+                                 FAR struct audio_buf_desc_s *bufdesc);
+static int audio_comp_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
+                                    FAR struct ap_buffer_s *apb);
+static int audio_comp_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
+                                   FAR struct ap_buffer_s *apb);
+static int audio_comp_ioctl(FAR struct audio_lowerhalf_s *dev, int cmd,
+                            unsigned long arg);
+static int audio_comp_read(FAR struct audio_lowerhalf_s *dev,
+                           FAR char *buffer, size_t buflen);
+static int audio_comp_write(FAR struct audio_lowerhalf_s *dev,
+                            FAR const char *buffer, size_t buflen);
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_reserve(FAR struct audio_lowerhalf_s *dev,
+                              FAR void **session);
+#else
+static int audio_comp_reserve(FAR struct audio_lowerhalf_s *dev);
+#endif
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_release(FAR struct audio_lowerhalf_s *dev,
+                              FAR void *session);
+#else
+static int audio_comp_release(FAR struct audio_lowerhalf_s *dev);
+#endif
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static void audio_comp_callback(FAR void *arg, uint16_t reason,
+                                FAR struct ap_buffer_s *apb, uint16_t status,
+                                FAR void *session);
+#else
+static void audio_comp_callback(FAR void *arg, uint16_t reason,
+                                FAR struct ap_buffer_s *apb, uint16_t status);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const struct audio_ops_s g_audio_comp_ops =
+{
+  audio_comp_getcaps,       /* getcaps        */
+  audio_comp_configure,     /* configure      */
+  audio_comp_shutdown,      /* shutdown       */
+  audio_comp_start,         /* start          */
+#ifndef CONFIG_AUDIO_EXCLUDE_STOP
+  audio_comp_stop,          /* stop           */
+#endif
+#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
+  audio_comp_pause,         /* pause          */
+  audio_comp_resume,        /* resume         */
+#endif
+  audio_comp_allocbuffer,   /* allocbuffer    */
+  audio_comp_freebuffer,    /* freebuffer     */
+  audio_comp_enqueuebuffer, /* enqueue_buffer */
+  audio_comp_cancelbuffer,  /* cancel_buffer  */
+  audio_comp_ioctl,         /* ioctl          */
+  audio_comp_read,          /* read           */
+  audio_comp_write,         /* write          */
+  audio_comp_reserve,       /* reserve        */
+  audio_comp_release        /* release        */
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: audio_comp_getcaps
+ *
+ * Description: Get the audio device capabilities
+ *
+ ****************************************************************************/
+
+static int audio_comp_getcaps(FAR struct audio_lowerhalf_s *dev, int type,
+                              FAR struct audio_caps_s *caps)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  caps->ac_channels   = 0;
+  caps->ac_format.hw  = 0;
+  caps->ac_controls.w = 0;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->getcaps)
+        {
+          FAR struct audio_caps_s dup = *caps;
+
+          int tmp = lower[i]->ops->getcaps(lower[i], type, &dup);
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          ret = tmp;
+          if (ret < 0)
+            {
+              break;
+            }
+
+          if (caps->ac_channels < dup.ac_channels)
+            {
+              caps->ac_channels = dup.ac_channels;
+            }
+
+          caps->ac_format.hw   |= dup.ac_format.hw;
+          caps->ac_controls.w  |= dup.ac_controls.w;
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_configure
+ *
+ * Description:
+ *   Configure the audio device for the specified  mode of operation.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_configure(FAR struct audio_lowerhalf_s *dev,
+                                FAR void *session,
+                                FAR const struct audio_caps_s *caps)
+#else
+static int audio_comp_configure(FAR struct audio_lowerhalf_s *dev,
+                                FAR const struct audio_caps_s *caps)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess = session;
+#endif
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->configure)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->configure(lower[i], sess[i], caps);
+#else
+          int tmp = lower[i]->ops->configure(lower[i], caps);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          ret = tmp;
+          if (ret < 0)
+            {
+              break;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_shutdown
+ *
+ * Description:
+ *   Shutdown the driver and put it in the lowest power state possible.
+ *
+ ****************************************************************************/
+
+static int audio_comp_shutdown(FAR struct audio_lowerhalf_s *dev)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = priv->count - 1; i >= 0; i--)
+    {
+      if (lower[i]->ops->shutdown)
+        {
+          int tmp = lower[i]->ops->shutdown(lower[i]);
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          if (tmp < 0 || ret == -ENOTTY || ret >= 0)
+            {
+              ret = tmp;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_start
+ *
+ * Description:
+ *   Start the configured operation (audio streaming, volume enabled, etc.).
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_start(FAR struct audio_lowerhalf_s *dev,
+                            FAR void *session)
+#else
+static int audio_comp_start(FAR struct audio_lowerhalf_s *dev)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess = session;
+#endif
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->start)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->start(lower[i], sess[i]);
+#else
+          int tmp = lower[i]->ops->start(lower[i]);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          ret = tmp;
+          if (ret >= 0)
+            {
+              continue;
+            }
+
+          while (--i >= 0)
+            {
+              if (lower[i]->ops->stop)
+                {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+                  lower[i]->ops->stop(lower[i], sess[i]);
+#else
+                  lower[i]->ops->stop(lower[i]);
+#endif
+                }
+            }
+          break;
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_stop
+ *
+ * Description: Stop the configured operation (audio streaming, volume
+ *              disabled, etc.).
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_AUDIO_EXCLUDE_STOP
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_stop(FAR struct audio_lowerhalf_s *dev,
+                           FAR void *session)
+#else
+static int audio_comp_stop(FAR struct audio_lowerhalf_s *dev)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess = session;
+#endif
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = priv->count - 1; i >= 0; i--)
+    {
+      if (lower[i]->ops->stop)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->stop(lower[i], sess[i]);
+#else
+          int tmp = lower[i]->ops->stop(lower[i]);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          if (tmp < 0 || ret == -ENOTTY || ret >= 0)
+            {
+              ret = tmp;
+            }
+        }
+    }
+
+  return ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: audio_comp_pause
+ *
+ * Description: Pauses the playback.
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_pause(FAR struct audio_lowerhalf_s *dev,
+                            FAR void *session)
+#else
+static int audio_comp_pause(FAR struct audio_lowerhalf_s *dev)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess = session;
+#endif
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = priv->count - 1; i >= 0; i--)
+    {
+      if (lower[i]->ops->pause)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->pause(lower[i], sess[i]);
+#else
+          int tmp = lower[i]->ops->pause(lower[i]);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          if (tmp < 0 || ret == -ENOTTY || ret >= 0)
+            {
+              ret = tmp;
+            }
+        }
+    }
+
+  return ret;
+}
+#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
+
+/****************************************************************************
+ * Name: audio_comp_resume
+ *
+ * Description: Resumes the playback.
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_resume(FAR struct audio_lowerhalf_s *dev,
+                             FAR void *session)
+#else
+static int audio_comp_resume(FAR struct audio_lowerhalf_s *dev)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess = session;
+#endif
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->resume)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->resume(lower[i], sess[i]);
+#else
+          int tmp = lower[i]->ops->resume(lower[i]);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          ret = tmp;
+          if (ret >= 0)
+            {
+              continue;
+            }
+
+          while (--i >= 0)
+            {
+              if (lower[i]->ops->pause)
+                {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+                  lower[i]->ops->pause(lower[i], sess[i]);
+#else
+                  lower[i]->ops->pause(lower[i]);
+#endif
+                }
+            }
+          break;
+        }
+    }
+
+  return ret;
+}
+#endif /* CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME */
+
+/****************************************************************************
+ * Name: audio_comp_allocbuffer
+ *
+ * Description: Allocate an audio pipeline buffer.
+ *
+ ****************************************************************************/
+
+static int audio_comp_allocbuffer(FAR struct audio_lowerhalf_s *dev,
+                                  FAR struct audio_buf_desc_s *bufdesc)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->allocbuffer)
+        {
+          ret = lower[i]->ops->allocbuffer(lower[i], bufdesc);
+          if (ret != -ENOTTY)
+            {
+              break;
+            }
+        }
+    }
+
+  if (ret == -ENOTTY)
+    {
+      ret = apb_alloc(bufdesc);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_freebuffer
+ *
+ * Description: Free an audio pipeline buffer.
+ *
+ ****************************************************************************/
+
+static int audio_comp_freebuffer(FAR struct audio_lowerhalf_s *dev,
+                                 FAR struct audio_buf_desc_s *bufdesc)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->freebuffer)
+        {
+          ret = lower[i]->ops->freebuffer(lower[i], bufdesc);
+          if (ret != -ENOTTY)
+            {
+              break;
+            }
+        }
+    }
+
+  if (ret == -ENOTTY)
+    {
+      apb_free(bufdesc->u.pBuffer);
+      ret = sizeof(*bufdesc);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_enqueuebuffer
+ *
+ * Description: Enqueue an Audio Pipeline Buffer for playback/ processing.
+ *
+ ****************************************************************************/
+
+static int audio_comp_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
+                                    FAR struct ap_buffer_s *apb)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->enqueuebuffer)
+        {
+          ret = lower[i]->ops->enqueuebuffer(lower[i], apb);
+          if (ret != -ENOTTY)
+            {
+              break;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_cancelbuffer
+ *
+ * Description: Called when an enqueued buffer is being cancelled.
+ *
+ ****************************************************************************/
+
+static int audio_comp_cancelbuffer(FAR struct audio_lowerhalf_s *dev,
+                                   FAR struct ap_buffer_s *apb)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->cancelbuffer)
+        {
+          ret = lower[i]->ops->cancelbuffer(lower[i], apb);
+          if (ret != -ENOTTY)
+            {
+              break;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_ioctl
+ *
+ * Description: Perform a device ioctl
+ *
+ ****************************************************************************/
+
+static int audio_comp_ioctl(FAR struct audio_lowerhalf_s *dev, int cmd,
+                            unsigned long arg)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->ioctl)
+        {
+          int tmp = lower[i]->ops->ioctl(lower[i], cmd, arg);
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          ret = tmp;
+          if (ret < 0)
+            {
+              break;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_read
+ *
+ * Description:  Lower-half logic for read commands.
+ *
+ ****************************************************************************/
+
+static int audio_comp_read(FAR struct audio_lowerhalf_s *dev,
+                           FAR char *buffer, size_t buflen)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->read)
+        {
+          ret = lower[i]->ops->read(lower[i], buffer, buflen);
+          if (ret != -ENOTTY)
+            {
+              break;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_write
+ *
+ * Description:  Lower-half logic for write commands.
+ *
+ ****************************************************************************/
+
+static int audio_comp_write(FAR struct audio_lowerhalf_s *dev,
+                            FAR const char *buffer, size_t buflen)
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+  int ret = -ENOTTY;
+  int i;
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->write)
+        {
+          ret = lower[i]->ops->write(lower[i], buffer, buflen);
+          if (ret != -ENOTTY)
+            {
+              break;
+            }
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_reserve
+ *
+ * Description: Reserves a session.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_reserve(FAR struct audio_lowerhalf_s *dev,
+                              FAR void **session)
+#else
+static int audio_comp_reserve(FAR struct audio_lowerhalf_s *dev)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess;
+#endif
+  int ret = OK;
+  int i;
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  sess = kmm_calloc(priv->count, sizeof(*sess));
+  if (sess == NULL)
+    {
+      return -ENOMEM;
+    }
+#endif
+
+  for (i = 0; i < priv->count; i++)
+    {
+      if (lower[i]->ops->reserve)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->reserve(lower[i], &sess[i]);
+#else
+          int tmp = lower[i]->ops->reserve(lower[i]);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          ret = tmp;
+          if (ret >= 0)
+            {
+              continue;
+            }
+
+          while (--i >= 0)
+            {
+              if (lower[i]->ops->release)
+                {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+                  lower[i]->ops->release(lower[i], sess[i]);
+#else
+                  lower[i]->ops->release(lower[i]);
+#endif
+                }
+            }
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          kmm_free(sess);
+          sess = NULL;
+#endif
+          break;
+        }
+    }
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  *session = sess;
+#endif
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_release
+ *
+ * Description: Releases the session.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static int audio_comp_release(FAR struct audio_lowerhalf_s *dev,
+                              FAR void *session)
+#else
+static int audio_comp_release(FAR struct audio_lowerhalf_s *dev)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = (FAR struct audio_comp_priv_s *)dev;
+  FAR struct audio_lowerhalf_s **lower = priv->lower;
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  FAR void **sess = session;
+#endif
+  int ret = OK;
+  int i;
+
+  for (i = priv->count - 1; i >= 0; i--)
+    {
+      if (lower[i]->ops->release)
+        {
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+          int tmp = lower[i]->ops->release(lower[i], sess[i]);
+#else
+          int tmp = lower[i]->ops->release(lower[i]);
+#endif
+          if (tmp == -ENOTTY)
+            {
+              continue;
+            }
+
+          if (tmp < 0 || ret >= 0)
+            {
+              ret = tmp;
+            }
+        }
+    }
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  kmm_free(sess);
+#endif
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: audio_comp_callback
+ *
+ * Description:
+ *   Lower-to-upper level callback for buffer dequeueing.
+ *
+ * Input Parameters:
+ *   arg - The value of the 'priv' field from audio_lowerhalf_s.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+static void audio_comp_callback(FAR void *arg, uint16_t reason,
+                                FAR struct ap_buffer_s *apb, uint16_t status,
+                                FAR void *session)
+#else
+static void audio_comp_callback(FAR void *arg, uint16_t reason,
+                                FAR struct ap_buffer_s *apb, uint16_t status)
+#endif
+{
+  FAR struct audio_comp_priv_s *priv = arg;
+
+#ifdef CONFIG_AUDIO_MULTI_SESSION
+  priv->export.upper(priv->export.priv, reason, apb, status, session);
+#else
+  priv->export.upper(priv->export.priv, reason, apb, status);
+#endif
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: audio_comp_initialize
+ *
+ * Description:
+ *   Initialize the composite audio device.
+ *
+ * Input Parameters:
+ *   name - The name of the audio device.
+ *   ...  - The list of the lower half audio driver.
+ *
+ * Returned Value:
+ *   Zero on success; a negated errno value on failure.
+ *
+ * Note
+ *   The variable argument list must be NULL terminated.
+ *
+ ****************************************************************************/
+
+int audio_comp_initialize(FAR const char *name, ...)
+{
+  FAR struct audio_comp_priv_s *priv;
+  va_list ap;
+  va_list cp;
+  int ret = -ENOMEM;
+  int i;
+
+  va_start(ap, name);
+  va_copy(cp, ap);
+
+  priv = kmm_zalloc(sizeof(struct audio_comp_priv_s));
+  if (priv == NULL)
+    {
+      goto end_va;
+    }
+
+  priv->export.ops = &g_audio_comp_ops;
+
+  while(va_arg(ap, FAR struct audio_lowerhalf_s *))
+    {
+      priv->count++;
+    }
+
+  priv->lower = kmm_calloc(priv->count, sizeof(FAR struct audio_lowerhalf_s *));
+  if (priv->lower == NULL)
+    {
+      goto free_priv;
+    }
+
+  for (i = 0; i < priv->count; i++)
+    {
+      FAR struct audio_lowerhalf_s *tmp;
+
+      tmp = va_arg(cp, FAR struct audio_lowerhalf_s *);
+      tmp->upper = audio_comp_callback;
+      tmp->priv = priv;
+
+      priv->lower[i] = tmp;
+    }
+
+  ret = audio_register(name, &priv->export);
+  if (ret < 0)
+    {
+      goto free_lower;
+    }
+
+  va_end(ap);
+  return OK;
+
+free_lower:
+  kmm_free(priv->lower);
+free_priv:
+  kmm_free(priv);
+end_va:
+  va_end(ap);
+  return ret;
+}
diff --git a/include/nuttx/audio/audio_comp.h b/include/nuttx/audio/audio_comp.h
new file mode 100644
index 0000000000..b9b57c62fb
--- /dev/null
+++ b/include/nuttx/audio/audio_comp.h
@@ -0,0 +1,99 @@
+/****************************************************************************
+ * include/nuttx/audio/audio_comp.h
+ * A general audio driver to composite other lower level audio driver.
+ *
+ *   Copyright (C) 2018 Pinecone Inc. All rights reserved.
+ *   Author:  Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_AUDIO_AUDIO_COMP_H
+#define __INCLUDE_NUTTX_AUDIO_AUDIO_COMP_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifdef CONFIG_AUDIO_COMP
+#include <nuttx/audio/audio.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: audio_comp_initialize
+ *
+ * Description:
+ *   Initialize the composite audio device.
+ *
+ * Input Parameters:
+ *   name - The name of the audio device.
+ *   ...  - The list of the lower half audio driver.
+ *
+ * Returned Value:
+ *   Zero on success; a negated errno value on failure.
+ *
+ * Note
+ *   The variable argument list must be NULL terminated.
+ *
+ ****************************************************************************/
+
+int audio_comp_initialize(FAR const char *name, ...);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_AUDIO_COMP */
+#endif /* __INCLUDE_NUTTX_AUDIO_AUDIO_COMP_H */