diff --git a/fb2k/in_vgmstream.cpp b/fb2k/in_vgmstream.cpp
index b41a563e..972a0611 100644
--- a/fb2k/in_vgmstream.cpp
+++ b/fb2k/in_vgmstream.cpp
@@ -251,7 +251,7 @@ void input_vgmstream::retag(const file_info & p_info,abort_callback & p_abort) {
 
 bool input_vgmstream::g_is_our_content_type(const char * p_content_type) {return false;}
 bool input_vgmstream::g_is_our_path(const char * p_path,const char * p_extension) {
-	if(!stricmp_utf8(p_extension,"2dx")) return 1;
+	if(!stricmp_utf8(p_extension,"2dx9")) return 1;
 
 	if(!stricmp_utf8(p_extension,"aaap")) return 1;
 	if(!stricmp_utf8(p_extension,"aax")) return 1;
@@ -526,7 +526,7 @@ VALIDATE_COMPONENT_FILENAME("foo_input_vgmstream.dll");
 
 // File types go down here (and in the large chunk of IFs above
 // these are declared statically, and if anyone has a better idea i'd like to hear it - josh.
-DECLARE_MULTIPLE_FILE_TYPE("2DX Audio File (*.2DX)", 2dx);
+DECLARE_MULTIPLE_FILE_TYPE("2DX9 Audio File (*.2DX9)", 2dx9);
 
 DECLARE_MULTIPLE_FILE_TYPE("AAAP Audio File (*.AAAP)", aaap);
 DECLARE_MULTIPLE_FILE_TYPE("AAX Audio File (*.AAX)", aax);
diff --git a/readme.txt b/readme.txt
index 3a2cda6b..1f49ceae 100644
--- a/readme.txt
+++ b/readme.txt
@@ -231,7 +231,7 @@ multi:
 - .wav, .lwav (unsigned 8 bit PCM, 16 bit PCM, GC DSP ADPCM, MS IMA ADPCM)
 
 etc:
-- .2dx (MS ADPCM)
+- .2dx9 (MS ADPCM)
 - .aax (CRI ADX ADPCM)
 - .acm (InterPlay ACM)
 - .adp (GC DTK ADPCM)
diff --git a/src/libvgmstream.vcproj b/src/libvgmstream.vcproj
index d6b83568..4f793ca0 100644
--- a/src/libvgmstream.vcproj
+++ b/src/libvgmstream.vcproj
@@ -197,7 +197,7 @@
 				Name="Source Files"
 				>
 				<File
-					RelativePath=".\meta\2dx.c"
+					RelativePath=".\meta\2dx9.c"
 					>
 				</File>
 				<File
diff --git a/src/meta/2dx9.c b/src/meta/2dx9.c
new file mode 100644
index 00000000..cecbd88a
--- /dev/null
+++ b/src/meta/2dx9.c
@@ -0,0 +1,69 @@
+#include "meta.h"
+#include "../util.h"
+
+/* 2DX9 (found in beatmaniaIIDX16 - EMPRESS (Arcade) */
+VGMSTREAM * init_vgmstream_2dx9(STREAMFILE *streamFile) {
+    VGMSTREAM * vgmstream = NULL;
+    char filename[260];
+    off_t start_offset;
+
+	int loop_flag;
+	int channel_count;
+
+    /* check extension, case insensitive */
+    streamFile->get_name(streamFile,filename,sizeof(filename));
+    if (strcasecmp("2dx9",filename_extension(filename))) goto fail;
+
+    /* check header */
+    if (read_32bitBE(0x0,streamFile) != 0x32445839) /* 2DX9 */
+		goto fail;
+	if (read_32bitBE(0x18,streamFile) != 0x52494646) /* RIFF */
+		goto fail;
+	if (read_32bitBE(0x20,streamFile) != 0x57415645) /* WAVE */
+		goto fail;
+	if (read_32bitBE(0x24,streamFile) != 0x666D7420) /* fmt */
+		goto fail;
+    if (read_32bitBE(0x6a,streamFile) != 0x64617461) /* data */
+		goto fail;
+
+    loop_flag = 0;
+    channel_count = read_16bitLE(0x2e,streamFile);
+    
+	/* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    if (!vgmstream) goto fail;
+
+	/* fill in the vital statistics */
+    start_offset = 0x72;
+	vgmstream->channels = channel_count;
+    vgmstream->sample_rate = read_32bitLE(0x30,streamFile);
+    vgmstream->coding_type = coding_MSADPCM;
+    vgmstream->num_samples = read_32bitLE(0x66,streamFile);
+    vgmstream->layout_type = layout_none;
+	vgmstream->interleave_block_size = read_16bitLE(0x38,streamFile);
+    vgmstream->meta_type = meta_2DX9;
+
+    /* open the file for reading */
+    {
+        int i;
+        STREAMFILE * file;
+        file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
+        if (!file) goto fail;
+        for (i=0;i<channel_count;i++) {
+            vgmstream->ch[i].streamfile = file;
+
+            vgmstream->ch[i].channel_start_offset=
+                vgmstream->ch[i].offset=start_offset+
+                vgmstream->interleave_block_size*i;
+
+        }
+    }
+
+    
+	return vgmstream;
+
+fail:
+    /* clean up anything we may have opened */
+    if (vgmstream) close_vgmstream(vgmstream);
+    return NULL;
+}
diff --git a/src/meta/fsb.c b/src/meta/fsb.c
index 778dfc76..11d9b93f 100644
--- a/src/meta/fsb.c
+++ b/src/meta/fsb.c
@@ -213,6 +213,7 @@ VGMSTREAM * init_vgmstream_fsb4(STREAMFILE *streamFile) {
 		case 0x40204020:
 		case 0x50011000:
 		case 0x20205000:
+		case 0x30610080:
             vgmstream->coding_type = coding_PCM16LE;
             vgmstream->layout_type = layout_interleave;
             vgmstream->interleave_block_size = 0x2;
diff --git a/src/meta/meta.h b/src/meta/meta.h
index b43f9247..0511c68b 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -403,7 +403,7 @@ VGMSTREAM * init_vgmstream_rsd3gadp(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_sd9(STREAMFILE * streamFile);
 
-VGMSTREAM * init_vgmstream_2dx(STREAMFILE * streamFile);
+VGMSTREAM * init_vgmstream_2dx9(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_dsp_ygo(STREAMFILE * streamFile);
 
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 83f404f8..ff249c55 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -222,7 +222,7 @@ VGMSTREAM * (*init_vgmstream_fcns[])(STREAMFILE *streamFile) = {
     init_vgmstream_ps2_snd,
     init_vgmstream_naomi_adpcm,
 	  init_vgmstream_sd9,
-	  init_vgmstream_2dx,
+	  init_vgmstream_2dx9,
 	  init_vgmstream_dsp_ygo,
     init_vgmstream_ps2_vgv,
     init_vgmstream_ngc_gcub,
@@ -2458,10 +2458,10 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
             snprintf(temp,TEMPSIZE,"NAOMI/NAOMI2 Arcade games ADPCM header");
             break;
         case meta_SD9:
-            snprintf(temp,TEMPSIZE,"beatmaniaIIDX SD9 header");
+            snprintf(temp,TEMPSIZE,"beatmania IIDX SD9 header");
             break;
-		    case meta_2DX:
-            snprintf(temp,TEMPSIZE,"beatmaniaIIDX 2DX9 header");
+		    case meta_2DX9:
+            snprintf(temp,TEMPSIZE,"beatmania IIDX 2DX9 header");
             break;
         case meta_DSP_YGO:
             snprintf(temp,TEMPSIZE,"Konami custom DSP Header");
diff --git a/src/vgmstream.h b/src/vgmstream.h
index ab20d132..468cc4e4 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -431,7 +431,7 @@ typedef enum {
 	  meta_NGC_LPS,			      /* Rave Master (Groove Adventure Rave)(GC) */
     meta_NAOMI_ADPCM,		    /* NAOMI/NAOMI2 ARcade games */
 	  meta_SD9,               /* beatmaniaIIDX16 - EMPRESS (Arcade) */
-	  meta_2DX,               /* beatmaniaIIDX16 - EMPRESS (Arcade) */
+	  meta_2DX9,               /* beatmaniaIIDX16 - EMPRESS (Arcade) */
     meta_PS2_VGV,           /* Rune: Viking Warlord */
     meta_NGC_GCUB,          /* Sega Soccer Slam */
     meta_MAXIS_XA,          /* Sim City 3000 (PC) */
diff --git a/unix/data.c b/unix/data.c
index c80c7bc1..d89a6398 100644
--- a/unix/data.c
+++ b/unix/data.c
@@ -15,7 +15,7 @@ void vgmstream_mseek(InputPlayback *context,gulong ms);
 void vgmstream_file_info_box(gchar *pFile);
 
 gchar *vgmstream_exts [] = {
-  "2dx",
+  "2dx9",
 
   "aax",
   "acm",
diff --git a/winamp/in_vgmstream.c b/winamp/in_vgmstream.c
index d5597d40..d1bf4682 100644
--- a/winamp/in_vgmstream.c
+++ b/winamp/in_vgmstream.c
@@ -75,10 +75,10 @@ int fade_samples = 0;
 char working_extension_list[EXTENSION_LIST_SIZE] = {0};
 char * extension_list[] = {
 
-	  "2dx\0""2DX Audio File (*.2DX)\0",
+	  "2dx9\0""2DX9 Audio File (*.2DX9)\0",
 
 	  "aax\0AAX Audio File (*.AAX)\0",
-    "2dx\0""2DX Audio File (*.2DX)\0",
+    "2dx9\0""2DX9 Audio File (*.2DX9)\0",
     "aaap\0AAAP Audio File (*.AAAP)\0",
     "aax\0AAX Audio File (*.AAX)\0",
     "acm\0ACM Audio File (*.ACM)\0",