diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8690a6c..afd43cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}" "${CMAKE_INSTALL_PREFIX}/include")
 LINK_DIRECTORIES("${CMAKE_INSTALL_PREFIX}/lib")
  
 ADD_EXECUTABLE(dsd ${SRCS})
-TARGET_LINK_LIBRARIES(dsd mbe)
+TARGET_LINK_LIBRARIES(dsd mbe sndfile)
  
 install(TARGETS dsd DESTINATION bin)
 
diff --git a/dsd.h b/dsd.h
index 90160a9..5515faa 100644
--- a/dsd.h
+++ b/dsd.h
@@ -36,7 +36,7 @@
 #endif
 #include <math.h>
 #include <mbelib.h>
-
+#include <sndfile.h>
 /*
  * global variables
  */
@@ -59,8 +59,14 @@ typedef struct
   int scoperate;
   char audio_in_dev[1024];
   int audio_in_fd;
+  SNDFILE *audio_in_file;
+  SF_INFO *audio_in_file_info;
+  int audio_in_type; // 0 for device, 1 for file
   char audio_out_dev[1024];
   int audio_out_fd;
+  SNDFILE *audio_out_file;
+  SF_INFO *audio_out_file_info;
+  int audio_out_type; // 0 for device, 1 for file
   int split;
   int playoffset;
   char mbe_out_dir[1024];
diff --git a/dsd_audio.c b/dsd_audio.c
index e558dfd..3e0f2df 100644
--- a/dsd_audio.c
+++ b/dsd_audio.c
@@ -207,157 +207,185 @@ playSynthesizedVoice (dsd_opts * opts, dsd_state * state)
 void
 openAudioOutDevice (dsd_opts * opts, int speed)
 {
+  // get info of device/file
+  struct stat stat_buf;
+  stat(opts->audio_out_dev, &stat_buf);
+  if(S_ISREG(stat_buf.st_mode)) { // is this a regular file? then process with libsndfile.
+    opts->audio_out_type = 1;
+    opts->audio_out_file_info = calloc(1, sizeof(SF_INFO));
+    opts->audio_out_file_info->samplerate = 48000;
+    opts->audio_out_file_info->channels = 1;
+    opts->audio_out_file_info->format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
+    opts->audio_out_file = sf_open(opts->audio_out_dev, SFM_READ, opts->audio_out_file_info);
+    if(opts->audio_out_file == NULL) {
+        printf ("Error, couldn't open file %s\n", opts->audio_in_dev);
+    }
+  }
+  else { // this is a device, use old handling
 
 #ifdef SOLARIS
-  sample_info_t aset, aget;
-
-  opts->audio_out_fd = open (opts->audio_out_dev, O_WRONLY);
-  if (opts->audio_out_fd == -1)
-    {
-      printf ("Error, couldn't open %s\n", opts->audio_out_dev);
-      exit (1);
-    }
-
-  // get current
-  ioctl (opts->audio_out_fd, AUDIO_GETINFO, &aset);
-
-  aset.record.sample_rate = speed;
-  aset.play.sample_rate = speed;
-  aset.record.channels = 1;
-  aset.play.channels = 1;
-  aset.record.precision = 16;
-  aset.play.precision = 16;
-  aset.record.encoding = AUDIO_ENCODING_LINEAR;
-  aset.play.encoding = AUDIO_ENCODING_LINEAR;
-
-  if (ioctl (opts->audio_out_fd, AUDIO_SETINFO, &aset) == -1)
-    {
-      printf ("Error setting sample device parameters\n");
-      exit (1);
-    }
+    sample_info_t aset, aget;
+  
+    opts->audio_out_fd = open (opts->audio_out_dev, O_WRONLY);
+    if (opts->audio_out_fd == -1)
+      {
+        printf ("Error, couldn't open %s\n", opts->audio_out_dev);
+        exit (1);
+      }
+  
+    // get current
+    ioctl (opts->audio_out_fd, AUDIO_GETINFO, &aset);
+  
+    aset.record.sample_rate = speed;
+    aset.play.sample_rate = speed;
+    aset.record.channels = 1;
+    aset.play.channels = 1;
+    aset.record.precision = 16;
+    aset.play.precision = 16;
+    aset.record.encoding = AUDIO_ENCODING_LINEAR;
+    aset.play.encoding = AUDIO_ENCODING_LINEAR;
+  
+    if (ioctl (opts->audio_out_fd, AUDIO_SETINFO, &aset) == -1)
+      {
+        printf ("Error setting sample device parameters\n");
+        exit (1);
+      }
 #endif
 
 #if defined(BSD) && !defined(__APPLE__)
-
-  int fmt;
-
-  opts->audio_out_fd = open (opts->audio_out_dev, O_WRONLY);
-  if (opts->audio_out_fd == -1)
-    {
-      printf ("Error, couldn't open %s\n", opts->audio_out_dev);
-      opts->audio_out = 0;
-    }
-
-  fmt = 0;
-  if (ioctl (opts->audio_out_fd, SNDCTL_DSP_RESET) < 0)
-    {
-      printf ("ioctl reset error \n");
-    }
-  fmt = speed;
-  if (ioctl (opts->audio_out_fd, SNDCTL_DSP_SPEED, &fmt) < 0)
-    {
-      printf ("ioctl speed error \n");
-    }
-  fmt = 0;
-  if (ioctl (opts->audio_out_fd, SNDCTL_DSP_STEREO, &fmt) < 0)
-    {
-      printf ("ioctl stereo error \n");
-    }
-  fmt = AFMT_S16_LE;
-  if (ioctl (opts->audio_out_fd, SNDCTL_DSP_SETFMT, &fmt) < 0)
-    {
-      printf ("ioctl setfmt error \n");
-    }
-
+  
+    int fmt;
+  
+    opts->audio_out_fd = open (opts->audio_out_dev, O_WRONLY);
+    if (opts->audio_out_fd == -1)
+      {
+        printf ("Error, couldn't open %s\n", opts->audio_out_dev);
+        opts->audio_out = 0;
+      }
+  
+    fmt = 0;
+    if (ioctl (opts->audio_out_fd, SNDCTL_DSP_RESET) < 0)
+      {
+        printf ("ioctl reset error \n");
+      }
+    fmt = speed;
+    if (ioctl (opts->audio_out_fd, SNDCTL_DSP_SPEED, &fmt) < 0)
+      {
+        printf ("ioctl speed error \n");
+      }
+    fmt = 0;
+    if (ioctl (opts->audio_out_fd, SNDCTL_DSP_STEREO, &fmt) < 0)
+      {
+        printf ("ioctl stereo error \n");
+      }
+    fmt = AFMT_S16_LE;
+    if (ioctl (opts->audio_out_fd, SNDCTL_DSP_SETFMT, &fmt) < 0)
+      {
+        printf ("ioctl setfmt error \n");
+      }
+  
 #endif
-
+  }
   printf ("Audio Out Device: %s\n", opts->audio_out_dev);
 }
 
 void
 openAudioInDevice (dsd_opts * opts)
 {
-
+  // get info of device/file
+  struct stat stat_buf;
+  stat(opts->audio_in_dev, &stat_buf);
+  if(S_ISREG(stat_buf.st_mode)) { // is this a regular file? then process with libsndfile.
+    opts->audio_in_type = 1;
+    opts->audio_in_file_info = calloc(1, sizeof(SF_INFO));
+    opts->audio_in_file_info->channels = 1;
+    opts->audio_in_file = sf_open(opts->audio_in_dev, SFM_READ, opts->audio_in_file_info);
+    if(opts->audio_in_file == NULL) {
+        printf ("Error, couldn't open file %s\n", opts->audio_in_dev);
+    }
+  }
+  else { // this is a device, use old handling
+  opts->audio_in_type = 0;
 #ifdef SOLARIS
-  sample_info_t aset, aget;
-  int rgain;
-
-  rgain = 64;
-
-  if (opts->split == 1)
-    {
-      opts->audio_in_fd = open (opts->audio_in_dev, O_RDONLY);
-    }
-  else
-    {
-      opts->audio_in_fd = open (opts->audio_in_dev, O_RDWR);
-    }
-  if (opts->audio_in_fd == -1)
-    {
-      printf ("Error, couldn't open /dev/audio\n");
-    }
-
-  // get current
-  ioctl (opts->audio_in_fd, AUDIO_GETINFO, &aset);
-
-  aset.record.sample_rate = 48000;
-  aset.play.sample_rate = 48000;
-  aset.record.channels = 1;
-  aset.play.channels = 1;
-  aset.record.precision = 16;
-  aset.play.precision = 16;
-  aset.record.encoding = AUDIO_ENCODING_LINEAR;
-  aset.play.encoding = AUDIO_ENCODING_LINEAR;
-  aset.record.port = AUDIO_LINE_IN;
-  aset.record.gain = rgain;
-
-  if (ioctl (opts->audio_in_fd, AUDIO_SETINFO, &aset) == -1)
-    {
-      printf ("Error setting sample device parameters\n");
-      exit (1);
-    }
+    sample_info_t aset, aget;
+    int rgain;
+  
+    rgain = 64;
+  
+    if (opts->split == 1)
+      {
+        opts->audio_in_fd = open (opts->audio_in_dev, O_RDONLY);
+      }
+    else
+      {
+        opts->audio_in_fd = open (opts->audio_in_dev, O_RDWR);
+      }
+    if (opts->audio_in_fd == -1)
+      {
+        printf ("Error, couldn't open /dev/audio\n");
+      }
+  
+    // get current
+    ioctl (opts->audio_in_fd, AUDIO_GETINFO, &aset);
+  
+    aset.record.sample_rate = 48000;
+    aset.play.sample_rate = 48000;
+    aset.record.channels = 1;
+    aset.play.channels = 1;
+    aset.record.precision = 16;
+    aset.play.precision = 16;
+    aset.record.encoding = AUDIO_ENCODING_LINEAR;
+    aset.play.encoding = AUDIO_ENCODING_LINEAR;
+    aset.record.port = AUDIO_LINE_IN;
+    aset.record.gain = rgain;
+  
+    if (ioctl (opts->audio_in_fd, AUDIO_SETINFO, &aset) == -1)
+      {
+        printf ("Error setting sample device parameters\n");
+        exit (1);
+      }
 #endif
 
 #if defined(BSD) && !defined(__APPLE__)
-  int fmt;
-
-  if (opts->split == 1)
-    {
-      opts->audio_in_fd = open (opts->audio_in_dev, O_RDONLY);
-    }
-  else
-    {
-      opts->audio_in_fd = open (opts->audio_in_dev, O_RDWR);
-    }
-
-  if (opts->audio_in_fd == -1)
-    {
-      printf ("Error, couldn't open %s\n", opts->audio_in_dev);
-      opts->audio_out = 0;
-    }
-
-  fmt = 0;
-  if (ioctl (opts->audio_in_fd, SNDCTL_DSP_RESET) < 0)
-    {
-      printf ("ioctl reset error \n");
-    }
-  fmt = 48000;
-  if (ioctl (opts->audio_in_fd, SNDCTL_DSP_SPEED, &fmt) < 0)
-    {
-      printf ("ioctl speed error \n");
-    }
-  fmt = 0;
-  if (ioctl (opts->audio_in_fd, SNDCTL_DSP_STEREO, &fmt) < 0)
-    {
-      printf ("ioctl stereo error \n");
-    }
-  fmt = AFMT_S16_LE;
-  if (ioctl (opts->audio_in_fd, SNDCTL_DSP_SETFMT, &fmt) < 0)
-    {
-      printf ("ioctl setfmt error \n");
-    }
+    int fmt;
+  
+    if (opts->split == 1)
+      {
+        opts->audio_in_fd = open (opts->audio_in_dev, O_RDONLY);
+      }
+    else
+      {
+        opts->audio_in_fd = open (opts->audio_in_dev, O_RDWR);
+      }
+  
+    if (opts->audio_in_fd == -1)
+      {
+        printf ("Error, couldn't open %s\n", opts->audio_in_dev);
+        opts->audio_out = 0;
+      }
+  
+    fmt = 0;
+    if (ioctl (opts->audio_in_fd, SNDCTL_DSP_RESET) < 0)
+      {
+        printf ("ioctl reset error \n");
+      }
+    fmt = 48000;
+    if (ioctl (opts->audio_in_fd, SNDCTL_DSP_SPEED, &fmt) < 0)
+      {
+        printf ("ioctl speed error \n");
+      }
+    fmt = 0;
+    if (ioctl (opts->audio_in_fd, SNDCTL_DSP_STEREO, &fmt) < 0)
+      {
+        printf ("ioctl stereo error \n");
+      }
+    fmt = AFMT_S16_LE;
+    if (ioctl (opts->audio_in_fd, SNDCTL_DSP_SETFMT, &fmt) < 0)
+      {
+        printf ("ioctl setfmt error \n");
+      }
 #endif
-
+  }
   if (opts->split == 1)
     {
       printf ("Audio In Device: %s\n", opts->audio_in_dev);
diff --git a/dsd_symbol.c b/dsd_symbol.c
index b8fd812..9c4fcb0 100644
--- a/dsd_symbol.c
+++ b/dsd_symbol.c
@@ -78,8 +78,16 @@ getSymbol (dsd_opts * opts, dsd_state * state, int have_sync)
             }
           state->jitter = -1;
         }
-
-      result = read (opts->audio_in_fd, &sample, 2);
+      if(opts->audio_in_type == 0) {
+          result = read (opts->audio_in_fd, &sample, 2);
+      }
+      else {
+          result = sf_read_short(opts->audio_in_file, &sample, 1);
+          if(result == 0) {
+              exit(0);
+          }
+      }
+     // printf("res: %zd\n, offset: %lld", result, sf_seek(opts->audio_in_file, 0, SEEK_CUR));
       {
       	  #define NZEROS 60
 		  #define GAIN 7.423339364e+00