diff --git a/readme.txt b/readme.txt
index b3b2d967..a561e789 100644
--- a/readme.txt
+++ b/readme.txt
@@ -229,6 +229,7 @@ etc:
 - .sc (Activision EXAKT SASSC DPCM)
 - .sd9 (MS ADPCM)
 - .spw (FFXI PS-like ADPCM)
+- .stm renamed .ps2stm (DVI IMA ADPCM)
 - .str (SDX2 DPCM)
 - .stx (GC AFC ADPCM)
 - .um3 (Ogg Vorbis)
diff --git a/src/Makefile b/src/Makefile
index 38624614..62bf9735 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -215,7 +215,8 @@ META_OBJS=meta/adx_header.o \
     meta/pona.o \
     meta/fsb_test.o \
     meta/xbox_hlwav.o \
-    meta/stx.o
+    meta/stx.o \
+    meta/ps2_stm.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 e9913444..d3e54b2f 100644
--- a/src/libvgmstream.vcproj
+++ b/src/libvgmstream.vcproj
@@ -646,6 +646,10 @@
 					RelativePath=".\meta\ps2_sps.c"
 					>
 				</File>
+				<File
+					RelativePath=".\meta\ps2_stm.c"
+					>
+				</File>
 				<File
 					RelativePath=".\meta\ps2_str.c"
 					>
diff --git a/src/meta/Makefile.unix.am b/src/meta/Makefile.unix.am
index 014d5868..b82d578a 100644
--- a/src/meta/Makefile.unix.am
+++ b/src/meta/Makefile.unix.am
@@ -173,5 +173,6 @@ libmeta_la_SOURCES += pona.c
 libmeta_la_SOURCES += fsb_test.c
 libmeta_la_SOURCES += xbox_hlwav.c
 libmeta_la_SOURCES += stx.c
+libmeta_la_SOURCES += ps2_stm.c
 
 EXTRA_DIST = meta.h
diff --git a/src/meta/meta.h b/src/meta/meta.h
index 3b8fb745..a0721db1 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -427,4 +427,6 @@ VGMSTREAM * init_vgmstream_xbox_hlwav(STREAMFILE* streamFile);
 
 VGMSTREAM * init_vgmstream_stx(STREAMFILE* streamFile);
 
+VGMSTREAM * init_vgmstream_ps2_stm(STREAMFILE* streamFile);
+
 #endif
diff --git a/src/meta/ps2_stm.c b/src/meta/ps2_stm.c
new file mode 100644
index 00000000..64512149
--- /dev/null
+++ b/src/meta/ps2_stm.c
@@ -0,0 +1,77 @@
+#include "meta.h"
+#include "../util.h"
+
+/* STM: Red Dead Revolver */
+VGMSTREAM * init_vgmstream_ps2_stm(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("ps2stm",filename_extension(filename))) goto fail;
+
+	/* check header */
+    if (read_32bitBE(0x0,streamFile) != 0x53544d41) goto fail;
+    if (read_32bitBE(0x4,streamFile) != 0x6b690000) goto fail;
+
+    /* check bps */
+    if (read_32bitLE(0x10,streamFile) != 4) goto fail;
+
+    loop_flag = 0;
+    channel_count = read_32bitLE(0x14,streamFile);
+	 
+    /* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    if (!vgmstream) goto fail;
+
+    /* fill in the vital statistics */
+    start_offset = 0x800;
+    vgmstream->sample_rate = (uint16_t)read_32bitLE(0xc,streamFile);
+
+    vgmstream->coding_type = coding_INT_DVI_IMA;
+
+    vgmstream->num_samples = read_32bitLE(0x18,streamFile);
+
+    vgmstream->interleave_block_size = read_32bitLE(0x8,streamFile) / channel_count;
+
+	if(1 < channel_count)
+	{
+		/* not sure if this is right ... */
+		vgmstream->layout_type = layout_interleave;
+	} else {
+		vgmstream->layout_type = layout_none;
+	}
+    vgmstream->meta_type = meta_PS2_STM;
+
+	if(loop_flag) {
+		vgmstream->loop_start_sample=0;
+		vgmstream->loop_end_sample=vgmstream->num_samples;
+	}
+
+	/* 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 a78eca7a..cdf2abbd 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -234,6 +234,7 @@ VGMSTREAM * (*init_vgmstream_fcns[])(STREAMFILE *streamFile) = {
     init_vgmstream_pona,
     init_vgmstream_xbox_hlwav,
     init_vgmstream_stx,
+    init_vgmstream_ps2_stm,
 };
 
 #define INIT_VGMSTREAM_FCNS (sizeof(init_vgmstream_fcns)/sizeof(init_vgmstream_fcns[0]))
@@ -2348,6 +2349,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
         case meta_STX:
             snprintf(temp,TEMPSIZE,"Nintendo .stx header");
             break;
+        case meta_PS2_STM:
+            snprintf(temp,TEMPSIZE,"Red Dead Revolver .stm (.ps2stm)");
+            break;
         default:
            snprintf(temp,TEMPSIZE,"THEY SHOULD HAVE SENT A POET");
     }
diff --git a/src/vgmstream.h b/src/vgmstream.h
index c7c12fb5..8079f079 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -337,6 +337,7 @@ typedef enum {
 	meta_ADS,               /* Gauntlet Dark Legends (GC) */
 	meta_PS2_SPS,           /* Ape Escape 2 */
     meta_PS2_XA2_RRP,       /* RC Revenge Pro */
+    meta_PS2_STM,           /* Red Dead Revolver .stm, renamed .ps2stm */
 
     meta_XBOX_WAVM,			/* XBOX WAVM File */
     meta_XBOX_RIFF,			/* XBOX RIFF/WAVE File */
diff --git a/unix/data.c b/unix/data.c
index a6f17c91..7541185e 100644
--- a/unix/data.c
+++ b/unix/data.c
@@ -126,6 +126,7 @@ gchar *vgmstream_exts [] = {
   "pdt",
   "pnb",
   "pos",
+  "ps2stm",
   "psh",
   "psw",
 
diff --git a/winamp/in_vgmstream.c b/winamp/in_vgmstream.c
index 661d794b..0b496cfa 100644
--- a/winamp/in_vgmstream.c
+++ b/winamp/in_vgmstream.c
@@ -192,6 +192,7 @@ char * extension_list[] = {
     "pnb\0PNB Audio File (*.PNB)\0",
     "pona\0PONA Audio File (*.PONA)\0",
     "pos\0POS Audio File (*.POS)\0",
+    "ps2stm\0PS2STM Audio File (*.PS2STM)\0",
     "psh\0PSH Audio File (*.PSH)\0",
     "psw\0PSW Audio File (*.PSW)\0",