diff --git a/src/formats.c b/src/formats.c
index b756f0c3..84c5dacc 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -58,9 +58,7 @@ static const char* extension_list[] = {
     //"aif", //common
     "aif-Loop",
     "aifc", //common?
-    "aifcl", //fake extension for .aif???
     //"aiff", //common
-    "aiffl", //fake extension for .aif???
     "aix",
     "akb",
     "al",
diff --git a/src/meta/aif_asobo.c b/src/meta/aif_asobo.c
index 5a551727..c98333fd 100644
--- a/src/meta/aif_asobo.c
+++ b/src/meta/aif_asobo.c
@@ -6,23 +6,24 @@ VGMSTREAM* init_vgmstream_aif_asobo(STREAMFILE* sf) {
     VGMSTREAM* vgmstream = NULL;
     off_t start_offset;
     size_t data_size;
-    int loop_flag, channel_count;
+    int loop_flag, channels, sample_rate;
 
 
     /* checks */
-    /* aif: standard, .laif/aiffl: for plugins */
-    if ( !check_extensions(sf,"aif,laif,aiffl") )
+    if (read_u16le(0x00,sf) != 0x69) /* fmt chunk with Xbox codec */
         goto fail;
-    if ((uint16_t)read_16bitLE(0x00,sf) != 0x69) /* Xbox codec */
+    /* aif: standard, .laif: for plugins */
+    if ( !check_extensions(sf,"aif,laif") )
         goto fail;
 
-    channel_count = read_16bitLE(0x02,sf); /* assumed, only stereo is known */
-    if (channel_count != 2) goto fail;
+    channels = read_u16le(0x02,sf); /* assumed, only stereo is known */
+    if (channels != 2) goto fail;
 
-    /* 0x08: ? */
-    if ((uint16_t)read_16bitLE(0x0c,sf) != 0x24*channel_count) /* Xbox block */
+    sample_rate = read_u32le(0x04,sf);
+    /* 0x08: bitrate */
+    if (read_u16le(0x0c,sf) != 0x24 * channels) /* Xbox block */
         goto fail;
-    if ((uint16_t)read_16bitLE(0x0e,sf) != 0x04) /* Xbox bps */
+    if (read_u16le(0x0e,sf) != 0x04) /* Xbox bps */
         goto fail;
     loop_flag = 0;
 
@@ -31,17 +32,17 @@ VGMSTREAM* init_vgmstream_aif_asobo(STREAMFILE* sf) {
 
 
     /* build the VGMSTREAM */
-    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    vgmstream = allocate_vgmstream(channels, loop_flag);
     if (!vgmstream) goto fail;
 
     vgmstream->meta_type = meta_AIF_ASOBO;
-    vgmstream->sample_rate = read_32bitLE(0x04,sf);
-    vgmstream->num_samples = xbox_ima_bytes_to_samples(data_size,channel_count);
+    vgmstream->sample_rate = sample_rate;
+    vgmstream->num_samples = xbox_ima_bytes_to_samples(data_size, channels);
 
     vgmstream->coding_type = coding_XBOX_IMA;
     vgmstream->layout_type = layout_none;
 
-    if ( !vgmstream_open_stream(vgmstream, sf, start_offset) )
+    if (!vgmstream_open_stream(vgmstream, sf, start_offset))
         goto fail;
     return vgmstream;
 
diff --git a/src/meta/aifc.c b/src/meta/aifc.c
index 492203f9..dcfb0298 100644
--- a/src/meta/aifc.c
+++ b/src/meta/aifc.c
@@ -81,9 +81,11 @@ VGMSTREAM* init_vgmstream_aifc(STREAMFILE* sf) {
 
 
     /* checks */
+    if (!is_id32be(0x00,sf, "FORM"))
+        goto fail;
+
     /* .aif: common (AIFF or AIFC), .aiff: common AIFF, .aifc: common AIFC
-     * .laif/laifc/laiff: for plugins
-     * .aifcl/aiffl: for plugins?
+     * .laif/laiff/laifc: for plugins
      * .cbd2: M2 games
      * .bgm: Super Street Fighter II Turbo (3DO)
      * .acm: Crusader - No Remorse (SAT)
@@ -91,15 +93,17 @@ VGMSTREAM* init_vgmstream_aifc(STREAMFILE* sf) {
      * .ai: Dragon Force (SAT)
      * (extensionless: Doom (3DO)
      * .fda: Homeworld 2 (PC)
-     * .n64: Turok (N64) src */
+     * .n64: Turok (N64) src
+     * .pcm: Road Rash (SAT)
+     */
     if (check_extensions(sf, "aif,laif,")) {
         is_aifc_ext = 1;
         is_aiff_ext = 1;
     }
-    else if (check_extensions(sf, "aifc,laifc,aifcl,afc,cbd2,bgm,fda,n64")) {
+    else if (check_extensions(sf, "aifc,laifc,afc,cbd2,bgm,fda,n64")) {
         is_aifc_ext = 1;
     }
-    else if (check_extensions(sf, "aiff,laiff,acm,adp,ai,aiffl")) {
+    else if (check_extensions(sf, "aiff,laiff,acm,adp,ai,pcm")) {
         is_aiff_ext = 1;
     }
     else {
@@ -107,17 +111,16 @@ VGMSTREAM* init_vgmstream_aifc(STREAMFILE* sf) {
     }
 
     file_size = get_streamfile_size(sf);
-    if (read_u32be(0x00,sf) != 0x464F524D &&  /* "FORM" */
-        read_u32be(0x04,sf)+0x08 != file_size)
+    if (read_u32be(0x04,sf) + 0x08 != file_size)
         goto fail;
 
     /* AIFF originally allowed only PCM (non-compressed) audio, so newer AIFC was added,
      * though some AIFF with other codecs exist */
-    if (read_u32be(0x08,sf) == 0x41494643) { /* "AIFC" */
+    if (is_id32be(0x08,sf, "AIFC")) {
         if (!is_aifc_ext) goto fail;
         is_aifc = 1;
     }
-    else if (read_u32be(0x08,sf) == 0x41494646) { /* "AIFF" */
+    else if (is_id32be(0x08,sf, "AIFF")) {
         if (!is_aiff_ext) goto fail;
         is_aiff = 1;
     }
@@ -160,9 +163,7 @@ VGMSTREAM* init_vgmstream_aifc(STREAMFILE* sf) {
                     if (comm_found) goto fail;
                     comm_found = 1;
 
-                    channels = read_u16be(offset + 0x00,sf);
-                    if (channels <= 0) goto fail;
-
+                    channels     = read_u16be(offset + 0x00,sf);
                     sample_count = read_u32be(offset + 0x02,sf); /* sample_frames in theory, depends on codec */
                     sample_size  = read_u16be(offset + 0x06,sf);
                     sample_rate  = read_f80be(offset + 0x08,sf);
@@ -233,7 +234,7 @@ VGMSTREAM* init_vgmstream_aifc(STREAMFILE* sf) {
                                 coding_type = coding_PCM16BE;
                                 interleave = 2;
                                 break;
-                            case 4: /* Crusader: No Remorse (SAT), Road Rash (3DO) */
+                            case 4: /* Crusader: No Remorse (SAT), Road Rash (3DO/SAT) */
                                 coding_type = coding_XA;
                                 break;
                             default: