diff --git a/src/decode.c b/src/decode.c
index 9038086d..c632aff2 100644
--- a/src/decode.c
+++ b/src/decode.c
@@ -395,7 +395,7 @@ int get_vgmstream_samples_per_frame(VGMSTREAM* vgmstream) {
         case coding_IMA:
         case coding_DVI_IMA:
         case coding_SNDS_IMA:
-        case coding_OTNS_IMA:
+        case coding_QD_IMA:
         case coding_UBI_IMA:
         case coding_UBI_SCE_IMA:
         case coding_OKI16:
@@ -631,7 +631,7 @@ int get_vgmstream_frame_size(VGMSTREAM* vgmstream) {
         case coding_RAD_IMA_mono:
             return 0x14;
         case coding_SNDS_IMA:
-        case coding_OTNS_IMA:
+        case coding_QD_IMA:
             return 0; //todo: 0x01?
         case coding_UBI_IMA: /* variable (PCM then IMA) */
             return 0;
@@ -1173,7 +1173,7 @@ void decode_vgmstream(VGMSTREAM* vgmstream, int samples_written, int samples_to_
                         vgmstream->channels, vgmstream->samples_into_block, samples_to_do, ch);
             }
             break;
-        case coding_OTNS_IMA:
+        case coding_QD_IMA:
             for (ch = 0; ch < vgmstream->channels; ch++) {
                 decode_otns_ima(vgmstream, &vgmstream->ch[ch], buffer+ch,
                         vgmstream->channels, vgmstream->samples_into_block, samples_to_do, ch);
diff --git a/src/formats.c b/src/formats.c
index e9b36d7f..44b4eaca 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -747,7 +747,7 @@ static const coding_info coding_info_list[] = {
         {coding_DVI_IMA_int,        "Intel DVI 4-bit IMA ADPCM (mono/interleave)"},
         {coding_3DS_IMA,            "3DS IMA 4-bit ADPCM"},
         {coding_SNDS_IMA,           "Heavy Iron .snds 4-bit IMA ADPCM"},
-        {coding_OTNS_IMA,           "Omikron: The Nomad Soul 4-bit IMA ADPCM"},
+        {coding_QD_IMA,             "Quantic Dream 4-bit IMA ADPCM"},
         {coding_WV6_IMA,            "Gorilla Systems WV6 4-bit IMA ADPCM"},
         {coding_ALP_IMA,            "High Voltage ALP 4-bit IMA ADPCM"},
         {coding_FFTA2_IMA,          "Final Fantasy Tactics A2 4-bit IMA ADPCM"},
@@ -1167,7 +1167,7 @@ static const meta_info meta_info_list[] = {
         {meta_HYPERSCAN_KVAG,       "Mattel Hyperscan KVAG"},
         {meta_IOS_PSND,             "PSND Header"},
         {meta_BOS_ADP,              "ADP! header"},
-        {meta_OTNS_ADP,             "Omikron: The Nomad Soul ADP header"},
+        {meta_QD_ADP,               "Quantic Dream .ADP header"},
         {meta_EB_SFX,               "Excitebots .sfx header"},
         {meta_EB_SF0,               "assumed Excitebots .sf0 by extension"},
         {meta_MTAF,                 "Konami MTAF header"},
diff --git a/src/meta/meta.h b/src/meta/meta.h
index 1b3393dc..0ae0c662 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -533,9 +533,9 @@ VGMSTREAM * init_vgmstream_hyperscan_kvag(STREAMFILE* streamFile);
 
 VGMSTREAM * init_vgmstream_ios_psnd(STREAMFILE* streamFile);
 
-VGMSTREAM * init_vgmstream_pc_adp_bos(STREAMFILE* streamFile);
+VGMSTREAM* init_vgmstream_adp_bos(STREAMFILE* sf);
 
-VGMSTREAM * init_vgmstream_pc_adp_otns(STREAMFILE* streamFile);
+VGMSTREAM* init_vgmstream_adp_qd(STREAMFILE* sf);
 
 VGMSTREAM * init_vgmstream_eb_sfx(STREAMFILE* streamFile);
 VGMSTREAM * init_vgmstream_eb_sf0(STREAMFILE* streamFile);
diff --git a/src/meta/pc_adp.c b/src/meta/pc_adp.c
index 4ff7c07c..de7a5634 100644
--- a/src/meta/pc_adp.c
+++ b/src/meta/pc_adp.c
@@ -1,45 +1,43 @@
 #include "meta.h"
 
 /* ADP - from Balls of Steel */
-VGMSTREAM * init_vgmstream_pc_adp_bos(STREAMFILE *streamFile) {
-    VGMSTREAM * vgmstream = NULL;
+VGMSTREAM* init_vgmstream_adp_bos(STREAMFILE* sf) {
+    VGMSTREAM* vgmstream = NULL;
     off_t start_offset;
     int loop_flag = 0;
-	int channel_count;
+	int channels;
 
-    if (!check_extensions(streamFile,"adp")) goto fail;
-
-    /* check header */
-    if (read_32bitBE(0x00,streamFile) != 0x41445021) /* "ADP!" */
+    /* checks */
+    if (!check_extensions(sf,"adp"))
         goto fail;
 
-    loop_flag = (-1 != read_32bitLE(0x08,streamFile));
-    channel_count = 1;
-    
+    if (!is_id32be(0x00,sf, "ADP!"))
+        goto fail;
+
+    loop_flag = (-1 != read_s32le(0x08,sf));
+    channels = 1;
+    start_offset = 0x18;
+
+
 	/* build the VGMSTREAM */
-    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    vgmstream = allocate_vgmstream(channels, loop_flag);
     if (!vgmstream) goto fail;
 
-	/* fill in the vital statistics */
-    start_offset = 0x18;
-	vgmstream->channels = channel_count;
-    vgmstream->sample_rate = read_32bitLE(0x0C,streamFile);
-    vgmstream->num_samples = read_32bitLE(0x04,streamFile);
-    if (loop_flag) {
-        vgmstream->loop_start_sample = read_32bitLE(0x08,streamFile);
-        vgmstream->loop_end_sample = vgmstream->num_samples;
-    }
+    vgmstream->sample_rate = read_s32le(0x0C,sf);
+    vgmstream->num_samples = read_s32le(0x04,sf);
+    vgmstream->loop_start_sample = read_s32le(0x08,sf);
+    vgmstream->loop_end_sample = vgmstream->num_samples;
 
     vgmstream->coding_type = coding_DVI_IMA_int;
     vgmstream->layout_type = layout_none;
     vgmstream->meta_type = meta_BOS_ADP;
 
     // 0x10, 0x12 - both initial history?
-    //vgmstream->ch[0].adpcm_history1_32 = read_16bitLE(0x10,streamFile);
+    //vgmstream->ch[0].adpcm_history1_32 = read_16bitLE(0x10,sf);
     // 0x14 - initial step index?
-    //vgmstream->ch[0].adpcm_step_index = read_32bitLE(0x14,streamFile);
+    //vgmstream->ch[0].adpcm_step_index = read_32bitLE(0x14,sf);
 
-    if (!vgmstream_open_stream(vgmstream, streamFile, start_offset))
+    if (!vgmstream_open_stream(vgmstream, sf, start_offset))
         goto fail;
     return vgmstream;
 
diff --git a/src/meta/pc_adp_otns.c b/src/meta/pc_adp_otns.c
index 6efc43d5..86d92e38 100644
--- a/src/meta/pc_adp_otns.c
+++ b/src/meta/pc_adp_otns.c
@@ -1,43 +1,46 @@
-#include "meta.h"
-
-/* ADP - from Omikron: The Nomad Soul (PC/DC) */
-VGMSTREAM * init_vgmstream_pc_adp_otns(STREAMFILE *streamFile) {
-    VGMSTREAM * vgmstream = NULL;
-    off_t start_offset, datasize;
-    int loop_flag = 0, channel_count, stereo_flag;
-
-    if (!check_extensions(streamFile,"adp")) goto fail;
-
-    /* no ID, only a basic 0x10 header with filesize and nulls; do some extra checks */
-    datasize = read_32bitLE(0x00,streamFile) & 0x00FFFFFF; /*24 bit*/
-    if (datasize + 0x10 != streamFile->get_size(streamFile)
-            || read_32bitLE(0x04,streamFile) != 0
-            || read_32bitLE(0x08,streamFile) != 0
-            || read_32bitLE(0x0c,streamFile) != 0)
-        goto fail;
-
-    stereo_flag = read_8bit(0x03, streamFile);
-    if (stereo_flag > 1 || stereo_flag < 0) goto fail;
-    channel_count = stereo_flag ? 2 : 1;
-
-    /* build the VGMSTREAM */
-    vgmstream = allocate_vgmstream(channel_count,loop_flag);
-    if (!vgmstream) goto fail;
-
-    start_offset = 0x10;
-    vgmstream->channels = channel_count;
-    vgmstream->sample_rate = 22050;
-    vgmstream->num_samples = channel_count== 1 ? datasize*2 : datasize;
-
-    vgmstream->coding_type = coding_OTNS_IMA;
-    vgmstream->layout_type = layout_none;
-    vgmstream->meta_type = meta_OTNS_ADP;
-
-    if (!vgmstream_open_stream(vgmstream, streamFile, start_offset))
-        goto fail;
-    return vgmstream;
-
-fail:
-    close_vgmstream(vgmstream);
-    return NULL;
-}
+#include "meta.h"
+
+/* ADP - from Omikron: The Nomad Soul (PC/DC) */
+VGMSTREAM* init_vgmstream_adp_qd(STREAMFILE* sf) {
+    VGMSTREAM* vgmstream = NULL;
+    off_t start_offset, data_size;
+    int loop_flag = 0, channels, stereo_flag;
+
+
+    /* checks */
+    if (!check_extensions(sf,"adp"))
+        goto fail;
+
+    /* no ID, only a basic 0x10 header with filesize and nulls; do some extra checks */
+    data_size = read_u32le(0x00,sf) & 0x00FFFFFF; /*24 bit*/
+    if (data_size + 0x10 != sf->get_size(sf)
+            || read_u32le(0x04,sf) != 0
+            || read_u32le(0x08,sf) != 0
+            || read_u32le(0x0c,sf) != 0)
+        goto fail;
+
+    stereo_flag = read_u8(0x03, sf);
+    if (stereo_flag > 1 || stereo_flag < 0) goto fail;
+    channels = stereo_flag ? 2 : 1;
+    start_offset = 0x10;
+
+
+    /* build the VGMSTREAM */
+    vgmstream = allocate_vgmstream(channels, loop_flag);
+    if (!vgmstream) goto fail;
+
+    vgmstream->meta_type = meta_QD_ADP;
+    vgmstream->sample_rate = 22050;
+    vgmstream->num_samples = data_size * 2 / channels;
+
+    vgmstream->coding_type = coding_QD_IMA;
+    vgmstream->layout_type = layout_none;
+
+    if (!vgmstream_open_stream(vgmstream, sf, start_offset))
+        goto fail;
+    return vgmstream;
+
+fail:
+    close_vgmstream(vgmstream);
+    return NULL;
+}
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 10020537..a8ca6188 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -275,8 +275,8 @@ VGMSTREAM* (*init_vgmstream_functions[])(STREAMFILE* sf) = {
     init_vgmstream_ps2_wmus,
     init_vgmstream_hyperscan_kvag,
     init_vgmstream_ios_psnd,
-    init_vgmstream_pc_adp_bos,
-    init_vgmstream_pc_adp_otns,
+    init_vgmstream_adp_bos,
+    init_vgmstream_adp_qd,
     init_vgmstream_eb_sfx,
     init_vgmstream_eb_sf0,
     init_vgmstream_mtaf,
diff --git a/src/vgmstream.h b/src/vgmstream.h
index e8037c09..86b0efc7 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -106,7 +106,7 @@ typedef enum {
     coding_DVI_IMA_int,     /* DVI IMA ADPCM (mono/interleave, high nibble first) */
     coding_3DS_IMA,         /* 3DS IMA ADPCM */
     coding_SNDS_IMA,        /* Heavy Iron Studios .snds IMA ADPCM */
-    coding_OTNS_IMA,        /* Omikron The Nomad Soul IMA ADPCM */
+    coding_QD_IMA,
     coding_WV6_IMA,         /* Gorilla Systems WV6 4-bit IMA ADPCM */
     coding_ALP_IMA,         /* High Voltage ALP 4-bit IMA ADPCM */
     coding_FFTA2_IMA,       /* Final Fantasy Tactics A2 4-bit IMA ADPCM */
@@ -558,8 +558,8 @@ typedef enum {
     meta_PS2_WMUS,          /* The Warriors (PS2) */
     meta_HYPERSCAN_KVAG,    /* Hyperscan KVAG/BVG */
     meta_IOS_PSND,          /* Crash Bandicoot Nitro Kart 2 (iOS) */
-    meta_BOS_ADP,           /* ADP! (Balls of Steel, PC) */
-    meta_OTNS_ADP,          /* Omikron: The Nomad Soul .adp (PC/DC) */
+    meta_BOS_ADP,
+    meta_QD_ADP,
     meta_EB_SFX,            /* Excitebots .sfx */
     meta_EB_SF0,            /* Excitebots .sf0 */
     meta_MTAF,