diff --git a/fb2k/in_vgmstream.cpp b/fb2k/in_vgmstream.cpp
index 4ad0ae2e..3937d1bf 100644
--- a/fb2k/in_vgmstream.cpp
+++ b/fb2k/in_vgmstream.cpp
@@ -359,6 +359,7 @@ bool input_vgmstream::g_is_our_path(const char * p_path,const char * p_extension
 	if(!stricmp_utf8(p_extension,"logg")) return 1;
 	if(!stricmp_utf8(p_extension,"lpcm")) return 1;
 	if(!stricmp_utf8(p_extension,"lps")) return 1;
+	if(!stricmp_utf8(p_extension,"lsf")) return 1;
 	if(!stricmp_utf8(p_extension,"lwav")) return 1;
 
 	if(!stricmp_utf8(p_extension,"matx")) return 1;
@@ -657,6 +658,7 @@ DECLARE_MULTIPLE_FILE_TYPE("LEG Audio File (*.LEG)", leg);
 DECLARE_MULTIPLE_FILE_TYPE("LOGG Audio File (*.LOGG)", logg);
 DECLARE_MULTIPLE_FILE_TYPE("LPCM Audio File (*.LPCM)", lpcm);
 DECLARE_MULTIPLE_FILE_TYPE("LPS Audio File (*.LPS)", lps);
+DECLARE_MULTIPLE_FILE_TYPE("LSF Audio File (*.LSF)", lsf);
 DECLARE_MULTIPLE_FILE_TYPE("LWAV Audio File (*.LWAV)", lwav);
 
 DECLARE_MULTIPLE_FILE_TYPE("MATX Audio File (*.MATX)", matx);
diff --git a/readme.txt b/readme.txt
index 7d6f1c7b..290fffe7 100644
--- a/readme.txt
+++ b/readme.txt
@@ -240,11 +240,12 @@ etc:
 - .ahx (MPEG-2 Layer II)
 - .aix (CRI ADX ADPCM)
 - .baf (Blur ADPCM)
+- .bgw (FFXI PS-like ADPCM)
 - .bnsf (G.722.1)
 - .caf (Apple IMA4 ADPCM)
-- .bgw (FFXI PS-like ADPCM)
 - .de2 (MS ADPCM)
 - .kcey (EACS IMA ADPCM)
+- .lsf (LSF ADPCM)
 - .mwv (Level-5 0x555 ADPCM)
 - .ogg, .logg (Ogg Vorbis)
 - .p3d (Radical ADPCM)
diff --git a/src/Makefile b/src/Makefile
index 1827be92..7db8c557 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -19,7 +19,8 @@ CODING_OBJS=coding/adx_decoder.o \
     coding/nds_procyon_decoder.o \
     coding/l5_555_decoder.o \
     coding/SASSC_decoder.o \
-    coding/g7221_decoder.o
+    coding/g7221_decoder.o \
+    coding/lsf_decoder.o
 
 LAYOUT_OBJS=layout/ast_blocked.o \
     layout/blocked.o \
@@ -270,7 +271,8 @@ META_OBJS=meta/adx_header.o \
     meta/ps2_mtaf.o \
     meta/x360_tra.o \
     meta/ps2_iab.o \
-    meta/ps2_strlr.o
+    meta/ps2_strlr.o \
+    meta/lsf.o
 
 OBJECTS=vgmstream.o streamfile.o util.o $(CODING_OBJS) $(LAYOUT_OBJS) $(META_OBJS)
 
diff --git a/src/coding/Makefile.unix.am b/src/coding/Makefile.unix.am
index 0ae36c00..fa8a171d 100644
--- a/src/coding/Makefile.unix.am
+++ b/src/coding/Makefile.unix.am
@@ -27,5 +27,6 @@ libcoding_la_SOURCES += nds_procyon_decoder.c
 libcoding_la_SOURCES += l5_555_decoder.c
 libcoding_la_SOURCES += SASSC_decoder.c
 libcoding_la_SOURCES += g7221_decoder.c
+libcoding_la_SOURCES += lsf_decoder.c
 
 EXTRA_DIST = coding.h g72x_state.h
diff --git a/src/coding/coding.h b/src/coding/coding.h
index 8cbed5bc..d028c70d 100644
--- a/src/coding/coding.h
+++ b/src/coding/coding.h
@@ -110,4 +110,6 @@ void decode_l5_555(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacin
 
 void decode_SASSC(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
 
+void decode_lsf(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do);
+
 #endif
diff --git a/src/coding/lsf_decoder.c b/src/coding/lsf_decoder.c
new file mode 100644
index 00000000..3bed7901
--- /dev/null
+++ b/src/coding/lsf_decoder.c
@@ -0,0 +1,52 @@
+#include "coding.h"
+#include "../util.h"
+
+/* lsf ADPCM, as seen in Fastlane Street Racing */
+
+static const short lsf_coefs[5][2] = {
+    {0x73, -0x34},
+    {0, 0},
+    {0x62, -0x37},
+    {0x3C, 0},
+    {0x7A, -0x3c}
+};
+
+void decode_lsf(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) {
+    int i=first_sample;
+    int32_t sample_count;
+    const int bytes_per_frame = 0x1c;
+    const int samples_per_frame = (bytes_per_frame-1)*2;
+
+    int framesin = first_sample/samples_per_frame;
+
+    uint8_t q = 0xFF - read_8bit(framesin*bytes_per_frame + stream->offset,stream->streamfile);
+    int scale = (q&0xF0)>>4;
+    int coef_idx = q&0x0F;
+    int32_t hist1 = stream->adpcm_history1_16;
+    int32_t hist2 = stream->adpcm_history2_16;
+
+    first_sample = first_sample%samples_per_frame;
+
+    for (i=first_sample,sample_count=0; i<first_sample+samples_to_do; i++,sample_count+=channelspacing) {
+        int sample_byte = read_8bit(framesin*bytes_per_frame+stream->offset+1+i/2,stream->streamfile);
+
+        long prediction =
+            (hist1 * lsf_coefs[coef_idx][0] +
+             hist2 * lsf_coefs[coef_idx][1]) / 0x40;
+
+        prediction += (i&1?
+            get_high_nibble_signed(sample_byte):
+            get_low_nibble_signed(sample_byte)
+        ) * (1 << (12-scale));
+
+        prediction = clamp16(prediction);
+
+        hist2 = hist1;
+        hist1 = prediction;
+
+        outbuf[sample_count] = prediction;
+    }
+
+    stream->adpcm_history1_16 = hist1;
+    stream->adpcm_history2_16 = hist2;
+}
diff --git a/src/libvgmstream.vcproj b/src/libvgmstream.vcproj
index 8c798a4e..2e0c64d4 100644
--- a/src/libvgmstream.vcproj
+++ b/src/libvgmstream.vcproj
@@ -380,6 +380,10 @@
 					RelativePath=".\meta\kraw.c"
 					>
 				</File>
+				<File
+					RelativePath=".\meta\lsf.c"
+					>
+				</File>
 				<File
 					RelativePath=".\meta\maxis_xa.c"
 					>
@@ -1134,6 +1138,10 @@
 					RelativePath=".\coding\l5_555_decoder.c"
 					>
 				</File>
+				<File
+					RelativePath=".\coding\lsf_decoder.c"
+					>
+				</File>
 				<File
 					RelativePath=".\coding\mpeg_decoder.c"
 					>
diff --git a/src/meta/Makefile.unix.am b/src/meta/Makefile.unix.am
index d7989508..d6fbfed2 100644
--- a/src/meta/Makefile.unix.am
+++ b/src/meta/Makefile.unix.am
@@ -219,5 +219,6 @@ libmeta_la_SOURCES += ps2_mtaf.c
 libmeta_la_SOURCES += x360_tra.c
 libmeta_la_SOURCES += ps2_iab.c
 libmeta_la_SOURCES += ps2_strlr.c
+libmeta_la_SOURCES += lsf.c
 
 EXTRA_DIST = meta.h
diff --git a/src/meta/lsf.c b/src/meta/lsf.c
new file mode 100644
index 00000000..4d4cd306
--- /dev/null
+++ b/src/meta/lsf.c
@@ -0,0 +1,59 @@
+#include "meta.h"
+#include "../util.h"
+
+/* .lsf - Fastlane Street Racing (iPhone) */
+/* "!n1nj4n" */
+
+VGMSTREAM * init_vgmstream_lsf_n1nj4n(STREAMFILE *streamFile) {
+    VGMSTREAM * vgmstream = NULL;
+    char filename[260];
+
+    size_t file_size;
+    off_t start_offset;
+
+    /* check extension, case insensitive */
+    streamFile->get_name(streamFile,filename,sizeof(filename));
+    if (strcasecmp("lsf",filename_extension(filename))) goto fail;
+
+    /* check header */
+    if (read_32bitBE(0x0, streamFile) != 0x216E316E || // "!n1n"
+        read_32bitBE(0x4, streamFile) != 0x6A346E00)   // "j4n\0"
+        goto fail;
+
+    /* check size */
+    file_size = get_streamfile_size(streamFile);
+    if (read_32bitLE(0xC, streamFile) + 0x10 != file_size)
+        goto fail;
+
+    start_offset = 0x10;
+
+    /* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(1,0);
+    if (!vgmstream) goto fail;
+
+    /* fill in the vital statistics */
+    vgmstream->num_samples = (file_size-0x10)/0x1c*0x1b*2;
+    vgmstream->sample_rate = read_32bitLE(0x8, streamFile);
+
+    vgmstream->coding_type = coding_LSF;
+    vgmstream->layout_type = layout_none;
+    vgmstream->meta_type = meta_LSF_N1NJ4N;
+
+    /* open the file for reading */
+    {
+        vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
+
+        if (!vgmstream->ch[0].streamfile) goto fail;
+
+        vgmstream->ch[0].channel_start_offset=
+            vgmstream->ch[0].offset=start_offset;
+    }
+
+    return vgmstream;
+
+    /* clean up anything we may have opened */
+fail:
+    if (vgmstream) close_vgmstream(vgmstream);
+    return NULL;
+}
+
diff --git a/src/meta/meta.h b/src/meta/meta.h
index f7c94808..e9f7d087 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -553,4 +553,6 @@ VGMSTREAM * init_vgmstream_ps2_iab(STREAMFILE* streamFile);
 
 VGMSTREAM * init_vgmstream_ps2_strlr(STREAMFILE* streamFile);
 
+VGMSTREAM * init_vgmstream_lsf_n1nj4n(STREAMFILE* streamFile);
+
 #endif
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 10120541..dc29965c 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -298,6 +298,7 @@ VGMSTREAM * (*init_vgmstream_fcns[])(STREAMFILE *streamFile) = {
 	init_vgmstream_x360_tra,
 	init_vgmstream_ps2_iab,
 	init_vgmstream_ps2_strlr,
+    init_vgmstream_lsf_n1nj4n,
 };
 
 #define INIT_VGMSTREAM_FCNS (sizeof(init_vgmstream_fcns)/sizeof(init_vgmstream_fcns[0]))
@@ -857,6 +858,8 @@ int get_vgmstream_samples_per_frame(VGMSTREAM * vgmstream) {
         case coding_G7221:
             return 16000/50;
 #endif
+        case coding_LSF:
+            return 54;
         default:
             return 0;
     }
@@ -944,6 +947,8 @@ int get_vgmstream_frame_size(VGMSTREAM * vgmstream) {
             return 34;
         case coding_BAF_ADPCM:
             return 33;
+        case coding_LSF:
+            return 28;
 #ifdef VGM_USE_G7221
         case coding_G7221C:
         case coding_G7221:
@@ -1376,6 +1381,13 @@ void decode_vgmstream(VGMSTREAM * vgmstream, int samples_written, int samples_to
                         samples_to_do);
             }
 
+            break;
+        case coding_LSF:
+            for (chan=0;chan<vgmstream->channels;chan++) {
+                decode_lsf(&vgmstream->ch[chan],buffer+samples_written*vgmstream->channels+chan,
+                        vgmstream->channels,vgmstream->samples_into_block,
+                        samples_to_do);
+            }
             break;
     }
 }
@@ -1745,11 +1757,14 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
             snprintf(temp,TEMPSIZE,"Procyon Studio Digital Sound Elements NDS 4-bit APDCM");
             break;
         case coding_L5_555:
-            snprintf(temp,TEMPSIZE,"Level-5 0x555 ADPCM");
+            snprintf(temp,TEMPSIZE,"Level-5 0x555 4-bit ADPCM");
             break;
         case coding_SASSC:
             snprintf(temp,TEMPSIZE,"Activision / EXAKT SASSC 8-bit DPCM");
             break;
+        case coding_LSF:
+            snprintf(temp,TEMPSIZE,"lsf 4-bit ADPCM");
+            break;
         default:
             snprintf(temp,TEMPSIZE,"CANNOT DECODE");
     }
@@ -2761,6 +2776,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
             break;
 	    case meta_PS2_STRLR:
             snprintf(temp,TEMPSIZE,"STR L/R header");
+            break;
+        case meta_LSF_N1NJ4N:
+            snprintf(temp,TEMPSIZE,".lsf !n1nj4n header");
             break;
 		default:
            snprintf(temp,TEMPSIZE,"THEY SHOULD HAVE SENT A POET");
diff --git a/src/vgmstream.h b/src/vgmstream.h
index 2e405d97..30e886b9 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -122,6 +122,7 @@ typedef enum {
     coding_L5_555,          /* Level-5 0x555 */
     coding_SASSC,           /* Activision EXAKT SASSC DPCM */
     coding_PCM16LE_XOR_int, /* sample-level xor */
+    coding_LSF,             /* lsf ADPCM */
 } coding_t;
 
 /* The layout type specifies how the sound data is laid out in the file */
@@ -508,6 +509,7 @@ typedef enum {
 	meta_PS2_VGS,			// Princess Soft PS2 games
 	meta_PS2_IAB,			// Ueki no Housoku - Taosu ze Robert Juudan!! (PS2)
 	meta_PS2_STRLR,
+    meta_LSF_N1NJ4N,        /* .lsf n1nj4n Fastlane Street Racing (iPhone) */
 } meta_t;
 
 typedef struct {
diff --git a/unix/data.c b/unix/data.c
index 5b6a234a..2960f5e2 100644
--- a/unix/data.c
+++ b/unix/data.c
@@ -116,6 +116,7 @@ gchar *vgmstream_exts [] = {
   "logg",
   "lpcm",
   "lps",
+  "lsf",
   "lwav",
 
   "matx",
diff --git a/winamp/in_vgmstream.c b/winamp/in_vgmstream.c
index 096c13b2..7558b183 100644
--- a/winamp/in_vgmstream.c
+++ b/winamp/in_vgmstream.c
@@ -182,6 +182,7 @@ char * extension_list[] = {
     "logg\0LOGG Audio File (*.LOGG)\0",
     "lpcm\0LPCM Audio File (*.LPCM)\0",
     "lps\0LPS Audio File (*.LPS)\0",
+    "lsf\0LSF Audio File (*.LSF)\0",
     "lwav\0LWAV Audio File (*.LWAV)\0",
 
     "matx\0MATX Audio File (*.MATX)\0",