diff --git a/ao-play-async/ao_playasync.c b/ao-play-async/ao_playasync.c
index f44966a..b55e36c 100644
--- a/ao-play-async/ao_playasync.c
+++ b/ao-play-async/ao_playasync.c
@@ -351,7 +351,7 @@ static void init_ao()
   }
 }
 
-void *ao_create_async(int bits, int rate, int channels, int byte_format)
+void *ao_create_async(int bits, int rate, int channels, int byte_format, const char *wav_file_output)
 {
     init_ao();
 
@@ -364,7 +364,14 @@ void *ao_create_async(int bits, int rate, int channels, int byte_format)
     fmt.channels = channels;
     fmt.matrix = NULL;
 
-    ao_device *dev = ao_open_live(ao_default_driver_id(), &fmt, NULL);
+    ao_device *dev;
+    if (wav_file_output != NULL) {
+      int driver_id = ao_driver_id("wav");
+      dev = ao_open_file(driver_id, wav_file_output, 1, &fmt, NULL);
+    } else {
+      dev = ao_open_live(ao_default_driver_id(), &fmt, NULL);
+    }
+
     if (dev == NULL) {
       fprintf(stderr, "Cannot open ao-device, error code = %d\n", errno);
       return NULL;
diff --git a/ao-play-async/ao_playasync.h b/ao-play-async/ao_playasync.h
index 9b7c051..022fbdd 100644
--- a/ao-play-async/ao_playasync.h
+++ b/ao-play-async/ao_playasync.h
@@ -29,7 +29,7 @@ typedef struct {
 } BufferInfo_t;
 
 AOPLAYASYNC_EXPORT int ao_async_version(void);
-AOPLAYASYNC_EXPORT void *ao_create_async(int bits, int rate, int channels, int byte_format);
+AOPLAYASYNC_EXPORT void *ao_create_async(int bits, int rate, int channels, int byte_format, const char *wav_file_output);
 AOPLAYASYNC_EXPORT void ao_stop_async(void *handle);
 AOPLAYASYNC_EXPORT void ao_play_async(void *handle, int music_id, double at_second, double music_duration, int buf_size, void *mem, BufferInfo_t info);
 AOPLAYASYNC_EXPORT void ao_clear_async(void *handle);
diff --git a/lib/windows-x86_64/ao-play-async.dll b/lib/windows-x86_64/ao-play-async.dll
index 1fccd67..d363e77 100644
Binary files a/lib/windows-x86_64/ao-play-async.dll and b/lib/windows-x86_64/ao-play-async.dll differ
diff --git a/lib/windows-x86_64/libao-1.2.2.dll b/lib/windows-x86_64/libao-1.2.2.dll
index 841c693..b9b179b 100644
Binary files a/lib/windows-x86_64/libao-1.2.2.dll and b/lib/windows-x86_64/libao-1.2.2.dll differ
diff --git a/lib/windows-x86_64/libao-static-1.2.2.lib b/lib/windows-x86_64/libao-static-1.2.2.lib
index 113f655..2919992 100644
Binary files a/lib/windows-x86_64/libao-static-1.2.2.lib and b/lib/windows-x86_64/libao-static-1.2.2.lib differ