diff --git a/src/Makefile b/src/Makefile
index 6a9db907..f9517368 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -134,7 +134,8 @@ META_OBJS=meta/adx_header.o \
     meta/kraw.o \
     meta/ps2_xa2.o \
     meta/idsp.o \
-    meta/ngc_ymf.o
+    meta/ngc_ymf.o \
+    meta/nds_sad.o
 
 OBJECTS=vgmstream.o streamfile.o util.o $(CODING_OBJS) $(LAYOUT_OBJS) $(META_OBJS)
 
diff --git a/src/libvgmstream.vcproj b/src/libvgmstream.vcproj
index d87c42b3..725a040b 100644
--- a/src/libvgmstream.vcproj
+++ b/src/libvgmstream.vcproj
@@ -317,6 +317,10 @@
 					RelativePath=".\meta\musx.c"
 					>
 				</File>
+				<File
+					RelativePath=".\meta\nds_sad.c"
+					>
+				</File>
 				<File
 					RelativePath=".\meta\nds_strm.c"
 					>
diff --git a/src/meta/Makefile.unix.am b/src/meta/Makefile.unix.am
index b76aab1e..3ed5345f 100644
--- a/src/meta/Makefile.unix.am
+++ b/src/meta/Makefile.unix.am
@@ -103,4 +103,5 @@ libmeta_la_SOURCES += kraw.c
 libmeta_la_SOURCES += ps2_xa2.c
 libmeta_la_SOURCES += idsp.c
 libmeta_la_SOURCES += ngc_ymf.c
+libmeta_la_SOURCES += nds_sad.c
 EXTRA_DIST = meta.h
diff --git a/src/meta/meta.h b/src/meta/meta.h
index cf39ffe6..9da9611a 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -227,4 +227,6 @@ VGMSTREAM * init_vgmstream_idsp(STREAMFILE * streamFile);
 
 VGMSTREAM * init_vgmstream_ngc_ymf(STREAMFILE * streamFile);
 
+VGMSTREAM * init_vgmstream_sadl(STREAMFILE * streamFile);
+
 #endif
diff --git a/src/meta/nds_sad.c b/src/meta/nds_sad.c
new file mode 100644
index 00000000..4d160f52
--- /dev/null
+++ b/src/meta/nds_sad.c
@@ -0,0 +1,69 @@
+#include "meta.h"
+#include "../util.h"
+
+/* sadl (only the Professor Layton interleaved IMA version) */
+VGMSTREAM * init_vgmstream_sadl(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("sad",filename_extension(filename))) goto fail;
+
+    /* check header */
+    if (read_32bitBE(0x00,streamFile) != 0x7361646c) /* "sadl" */
+        goto fail;
+
+    /* check file size */
+    if (read_32bitLE(0x40,streamFile) != get_streamfile_size(streamFile) )
+        goto fail;
+
+    /* check for the simple IMA type that we can handle */
+    if (read_8bit(0xc,streamFile) != 0x11)
+        goto fail;
+
+    loop_flag = 0;
+    channel_count = 2;
+    
+	/* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    if (!vgmstream) goto fail;
+
+	/* fill in the vital statistics */
+    start_offset = 0x100;
+	vgmstream->channels = channel_count;
+    vgmstream->sample_rate = 16000;
+    vgmstream->coding_type = coding_INT_IMA;
+    vgmstream->num_samples = read_32bitLE(0x50,streamFile);;
+    vgmstream->interleave_block_size=0x10;
+
+    vgmstream->layout_type = layout_interleave;
+    vgmstream->meta_type = meta_SADL;
+
+    /* 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;
+
+    /* clean up anything we may have opened */
+fail:
+    if (vgmstream) close_vgmstream(vgmstream);
+    return NULL;
+}
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 86499066..963fbb5d 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -129,6 +129,7 @@ VGMSTREAM * (*init_vgmstream_fcns[])(STREAMFILE *streamFile) = {
 	init_vgmstream_ps2_xa2,
 	init_vgmstream_idsp,
 	init_vgmstream_ngc_ymf,
+    init_vgmstream_sadl,
 };
 
 #define INIT_VGMSTREAM_FCNS (sizeof(init_vgmstream_fcns)/sizeof(init_vgmstream_fcns[0]))
@@ -545,6 +546,7 @@ int get_vgmstream_samples_per_frame(VGMSTREAM * vgmstream) {
 		case coding_EACS_IMA:
         case coding_IMA:
             return 1;
+        case coding_INT_IMA:
 		case coding_INT_DVI_IMA:
         case coding_AICA:
 			return 2;
@@ -629,6 +631,7 @@ int get_vgmstream_frame_size(VGMSTREAM * vgmstream) {
 			return 1; // the frame is variant in size
         case coding_WS:
             return vgmstream->current_block_size;
+        case coding_INT_IMA:
         case coding_INT_DVI_IMA:
         case coding_AICA:
 			return 1; 
@@ -837,6 +840,7 @@ void decode_vgmstream(VGMSTREAM * vgmstream, int samples_written, int samples_to
             }
             break;
 		case coding_IMA:
+        case coding_INT_IMA:
             for (chan=0;chan<vgmstream->channels;chan++) {
                 decode_ima(&vgmstream->ch[chan],buffer+samples_written*vgmstream->channels+chan,
                         vgmstream->channels,vgmstream->samples_into_block,
@@ -1145,6 +1149,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
 		case coding_EACS_IMA:
             snprintf(temp,TEMPSIZE,"EACS 4-bit IMA ADPCM");
             break;
+        case coding_INT_IMA:
+            snprintf(temp,TEMPSIZE,"Interleaved 4-bit IMA ADPCM");
+            break;
         case coding_IMA:
             snprintf(temp,TEMPSIZE,"4-bit IMA ADPCM");
             break;
@@ -1507,6 +1514,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
         case meta_DSP_SADB:
             snprintf(temp,TEMPSIZE,"sadb header");
             break;
+        case meta_SADL:
+            snprintf(temp,TEMPSIZE,"sadl header");
+            break;
         case meta_PS2_BMDX:
             snprintf(temp,TEMPSIZE,"Beatmania .bmdx header");
             break;
diff --git a/src/vgmstream.h b/src/vgmstream.h
index 70e1b5ec..96c1e640 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -64,6 +64,7 @@ typedef enum {
 	coding_INT_DVI_IMA,		/* Interleaved DVI */
 	coding_EACS_IMA,
     coding_IMA,             /* bare IMA, low nibble first */
+    coding_INT_IMA,         /* */
     coding_WS,              /* Westwood Studios' custom VBR ADPCM */
 #ifdef VGM_USE_MPEG
     coding_fake_MPEG2_L2,   /* MPEG-2 Layer 2 (AHX), with lying headers */
@@ -235,6 +236,7 @@ typedef enum {
 	meta_PS2_XA2,			/* XA2 XG3 file */
 	meta_IDSP,				/* Chronicles of Narnia */
 	meta_NGC_YMF,			/* WWE WrestleMania X8 */
+    meta_SADL,              /* .sad */
 
 	meta_XBOX_WAVM,			/* XBOX WAVM File */
 	meta_XBOX_RIFF,			/* XBOX RIFF/WAVE File */