diff --git a/fb2k/in_vgmstream.cpp b/fb2k/in_vgmstream.cpp
index e002ea0a..4ad0ae2e 100644
--- a/fb2k/in_vgmstream.cpp
+++ b/fb2k/in_vgmstream.cpp
@@ -352,6 +352,7 @@ bool input_vgmstream::g_is_our_path(const char * p_path,const char * p_extension
 	if(!stricmp_utf8(p_extension,"kces")) return 1;
 	if(!stricmp_utf8(p_extension,"kcey")) return 1;
 	if(!stricmp_utf8(p_extension,"khv")) return 1;
+	if(!stricmp_utf8(p_extension,"kovs")) return 1;
 	if(!stricmp_utf8(p_extension,"kraw")) return 1;
 
 	if(!stricmp_utf8(p_extension,"leg")) return 1;
@@ -649,6 +650,7 @@ DECLARE_MULTIPLE_FILE_TYPE("JSTM Audio File (*.JSTM)", jstm);
 DECLARE_MULTIPLE_FILE_TYPE("KCES Audio File (*.KCES)", kces);
 DECLARE_MULTIPLE_FILE_TYPE("KCEY Audio File (*.KCEY)", kcey);
 DECLARE_MULTIPLE_FILE_TYPE("KHV Audio File (*.KHV)", khv);
+DECLARE_MULTIPLE_FILE_TYPE("KOVS Audio File (*.KOVS)", kovs);
 DECLARE_MULTIPLE_FILE_TYPE("KRAW Audio File (*.KRAW)", kraw);
 
 DECLARE_MULTIPLE_FILE_TYPE("LEG Audio File (*.LEG)", leg);
diff --git a/src/meta/ogg_vorbis_file.c b/src/meta/ogg_vorbis_file.c
index f7dd379b..09ff2ead 100644
--- a/src/meta/ogg_vorbis_file.c
+++ b/src/meta/ogg_vorbis_file.c
@@ -55,6 +55,31 @@ static size_t read_func_um3(void *ptr, size_t size, size_t nmemb, void * datasou
     return items_read;
 }
 
+static size_t read_func_kovs(void *ptr, size_t size, size_t nmemb, void * datasource)
+{
+    ogg_vorbis_streamfile * const ov_streamfile = datasource;
+    size_t items_read;
+
+    size_t bytes_read;
+   
+    bytes_read = read_streamfile(ptr, ov_streamfile->offset+0x20, size * nmemb,
+            ov_streamfile->streamfile);
+
+    items_read = bytes_read / size;
+
+    /* first 0x100 bytes of KOVS are xor'd with offset */
+    if (ov_streamfile->offset < 0x100) {
+        int i;
+
+        for (i=ov_streamfile->offset;i<0x100;i++)
+            ((uint8_t*)ptr)[i-ov_streamfile->offset] ^= i;
+    }
+
+    ov_streamfile->offset += items_read * size;
+
+    return items_read;
+}
+
 static int seek_func(void *datasource, ogg_int64_t offset, int whence) {
     ogg_vorbis_streamfile * const ov_streamfile = datasource;
     ogg_int64_t base_offset;
@@ -116,7 +141,9 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
     int loop_end_found = 0;
     int32_t loop_end = 0;
 
+    off_t other_header_bytes = 0;
     int um3_ogg = 0;
+    int kovs_ogg = 0;
 
     /* check extension, case insensitive */
     streamFile->get_name(streamFile,filename,sizeof(filename));
@@ -126,21 +153,41 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
        may be renamed to .logg. This meta reader should still support .ogg,
        though. */
     if (strcasecmp("logg",filename_extension(filename)) &&
-            strcasecmp("ogg",filename_extension(filename))
-       ) {
-        if(!strcasecmp("um3",filename_extension(filename))) {
+            strcasecmp("ogg",filename_extension(filename))) {
+        if (!strcasecmp("um3",filename_extension(filename))) {
             um3_ogg = 1;
+        } else if (!strcasecmp("kovs",filename_extension(filename))) {
+            kovs_ogg = 1;
+        } else {
+            goto fail;
         }
-        else goto fail;
     }
 
     /* not all um3-ogg are crypted */
-    if (um3_ogg && read_32bitBE(0x0,streamFile)==0x4f676753) um3_ogg = 0;
+    if (um3_ogg && read_32bitBE(0x0,streamFile)==0x4f676753) {
+        um3_ogg = 0;
+    }
 
-    if (um3_ogg)
+    /* use KOVS header */
+    if (kovs_ogg) {
+        if (read_32bitBE(0x0,streamFile)!=0x4b4f5653) { /* "KOVS" */
+            goto fail;
+        }
+        if (read_32bitLE(0x8,streamFile)!=0) {
+            loop_start = read_32bitLE(0x8,streamFile);
+            loop_flag = 1;
+        }
+
+        other_header_bytes = 0x20;
+    }
+
+    if (um3_ogg) {
         callbacks.read_func = read_func_um3;
-    else
+    } else if (kovs_ogg) {
+        callbacks.read_func = read_func_kovs;
+    } else {
         callbacks.read_func = read_func;
+    }
     callbacks.seek_func = seek_func;
     callbacks.close_func = close_func;
     callbacks.tell_func = tell_func;
@@ -148,6 +195,7 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
     temp_streamfile.streamfile = streamFile;
     temp_streamfile.offset = 0;
     temp_streamfile.size = get_streamfile_size(temp_streamfile.streamfile);
+    temp_streamfile.size -= other_header_bytes;
 
     /* can we open this as a proper ogg vorbis file? */
     memset(&temp_ovf, 0, sizeof(temp_ovf));
@@ -166,6 +214,7 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
     if (!data->ov_streamfile.streamfile) goto fail;
     data->ov_streamfile.offset = 0;
     data->ov_streamfile.size = get_streamfile_size(data->ov_streamfile.streamfile);
+    data->ov_streamfile.size -= other_header_bytes;
 
     /* open the ogg vorbis file for real */
     if (ov_open_callbacks(&data->ov_streamfile, &data->ogg_vorbis_file, NULL,
@@ -266,10 +315,13 @@ VGMSTREAM * init_vgmstream_ogg_vorbis(STREAMFILE *streamFile) {
     }
     vgmstream->coding_type = coding_ogg_vorbis;
     vgmstream->layout_type = layout_ogg_vorbis;
-    if (um3_ogg)
+    if (um3_ogg) {
         vgmstream->meta_type = meta_um3_ogg;
-    else
+    } else if (kovs_ogg) {
+        vgmstream->meta_type = meta_KOVS_ogg;
+    } else {
         vgmstream->meta_type = meta_ogg_vorbis;
+    }
 
     return vgmstream;
 
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 9f23de29..471b6036 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -2094,6 +2094,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
         case meta_um3_ogg:
             snprintf(temp,TEMPSIZE,"Ogg Vorbis, Ultramarine3 \"encryption\"");
             break;
+        case meta_KOVS_ogg:
+            snprintf(temp,TEMPSIZE,"Ogg Vorbis, KOVS header");
+            break;
 #endif
         case meta_DSP_SADB:
             snprintf(temp,TEMPSIZE,"sadb header");
diff --git a/src/vgmstream.h b/src/vgmstream.h
index d5574ed1..a78b25f6 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -397,6 +397,7 @@ typedef enum {
     meta_OGG_SLI2,          /* Ogg Vorbis file w/ different styled .sli for looping */
     meta_OGG_SFL,           /* Ogg Vorbis file w/ .sfl (RIFF SFPL) for looping */
     meta_um3_ogg,           /* Ogg Vorbis with first 0x800 bytes XOR 0xFF */
+    meta_KOVS_ogg,          /* Ogg Vorbis with exta header and 0x100 bytes XOR */
 #endif
 
     meta_AIFC,              /* Audio Interchange File Format AIFF-C */
diff --git a/unix/data.c b/unix/data.c
index 569a40ef..5b6a234a 100644
--- a/unix/data.c
+++ b/unix/data.c
@@ -109,6 +109,7 @@ gchar *vgmstream_exts [] = {
   "kces",
   "kcey",
   "khv",
+  "kovs",
   "kraw",
 
   "leg",
diff --git a/winamp/in_vgmstream.c b/winamp/in_vgmstream.c
index b16ad48d..33492d87 100644
--- a/winamp/in_vgmstream.c
+++ b/winamp/in_vgmstream.c
@@ -175,6 +175,7 @@ char * extension_list[] = {
     "kces\0KCES Audio File (*.KCES)\0",
     "kcey\0KCEY Audio File (*.KCEY)\0",
     "khv\0KHV Audio File (*.KHV)\0",
+    "kovs\0KOVS Audio File (*.KOVS)\0",
     "kraw\0KRAW Audio File (*.KRAW)\0",
 
     "leg\0LEG Audio File (*.LEG)\0",