diff --git a/src/meta/ngc_dsp_std.c b/src/meta/ngc_dsp_std.c
index 83cca097..fe9fa595 100644
--- a/src/meta/ngc_dsp_std.c
+++ b/src/meta/ngc_dsp_std.c
@@ -606,55 +606,60 @@ VGMSTREAM * init_vgmstream_sadb(STREAMFILE *streamFile) {
 
     struct dsp_header ch0_header,ch1_header;
     int i;
+    int channel_count;
 
     /* check extension, case insensitive */
     streamFile->get_name(streamFile,filename,sizeof(filename));
     if (strcasecmp("sad",filename_extension(filename))) goto fail;
 
-    if (read_dsp_header(&ch0_header, 0x80, streamFile)) goto fail;
-    if (read_dsp_header(&ch1_header, 0xe0, streamFile)) goto fail;
-
     /* check header magic */
     if (read_32bitBE(0x0,streamFile) != 0x73616462) goto fail; /* "sadb" */
 
+    channel_count = read_8bit(0x32, streamFile);
+    if (channel_count != 1 && channel_count != 2) goto fail;
+
+    if (read_dsp_header(&ch0_header, 0x80, streamFile)) goto fail;
+    if (channel_count == 2 && read_dsp_header(&ch1_header, 0xe0, streamFile)) goto fail;
+
     start_offset = read_32bitBE(0x48,streamFile);
     interleave = 16;
 
     /* check initial predictor/scale */
     if (ch0_header.initial_ps != (uint8_t)read_8bit(start_offset,streamFile))
         goto fail;
-    if (ch1_header.initial_ps != (uint8_t)read_8bit(start_offset+interleave,streamFile))
+    if (channel_count == 2 && ch1_header.initial_ps != (uint8_t)read_8bit(start_offset+interleave,streamFile))
         goto fail;
 
     /* check type==0 and gain==0 */
     if (ch0_header.format || ch0_header.gain ||
-        ch1_header.format || ch1_header.gain)
+        (channel_count == 2 &&(ch1_header.format || ch1_header.gain)))
         goto fail;
 
     /* check for agreement */
-    if (
+    if ( channel_count == 2 &&(
             ch0_header.sample_count != ch1_header.sample_count ||
             ch0_header.nibble_count != ch1_header.nibble_count ||
             ch0_header.sample_rate != ch1_header.sample_rate ||
             ch0_header.loop_flag != ch1_header.loop_flag ||
             ch0_header.loop_start_offset != ch1_header.loop_start_offset ||
             ch0_header.loop_end_offset != ch1_header.loop_end_offset
-       ) goto fail;
+            )) goto fail;
 
     if (ch0_header.loop_flag) {
         off_t loop_off;
         /* check loop predictor/scale */
-        loop_off = ch0_header.loop_start_offset/16*8;
-        loop_off = (loop_off/interleave*interleave*2) + (loop_off%interleave);
+        loop_off = ch0_header.loop_start_offset/8/channel_count*8;
+        loop_off = (loop_off/interleave*interleave*channel_count) + (loop_off%interleave);
         if (ch0_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off,streamFile))
             goto fail;
-        if (ch1_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off+interleave,streamFile))
+        if (channel_count == 2 &&
+                ch1_header.loop_ps != (uint8_t)read_8bit(start_offset+loop_off+interleave,streamFile))
             goto fail;
     }
 
     /* build the VGMSTREAM */
 
-    vgmstream = allocate_vgmstream(2,ch0_header.loop_flag);
+    vgmstream = allocate_vgmstream(channel_count,ch0_header.loop_flag);
     if (!vgmstream) goto fail;
 
     /* fill in the vital statistics */
@@ -668,29 +673,33 @@ VGMSTREAM * init_vgmstream_sadb(STREAMFILE *streamFile) {
             ch0_header.loop_end_offset)+1;
 
     vgmstream->coding_type = coding_NGC_DSP;
-    vgmstream->layout_type = layout_interleave;
+    vgmstream->layout_type = channel_count == 2 ? layout_interleave : layout_none;
     vgmstream->interleave_block_size = interleave;
     vgmstream->meta_type = meta_DSP_SADB;
 
     /* coeffs */
     for (i=0;i<16;i++) {
         vgmstream->ch[0].adpcm_coef[i] = ch0_header.coef[i];
-        vgmstream->ch[1].adpcm_coef[i] = ch1_header.coef[i];
+        if (channel_count == 2)
+            vgmstream->ch[1].adpcm_coef[i] = ch1_header.coef[i];
     }
     
     /* initial history */
     /* always 0 that I've ever seen, but for completeness... */
     vgmstream->ch[0].adpcm_history1_16 = ch0_header.initial_hist1;
     vgmstream->ch[0].adpcm_history2_16 = ch0_header.initial_hist2;
-    vgmstream->ch[1].adpcm_history1_16 = ch1_header.initial_hist1;
-    vgmstream->ch[1].adpcm_history2_16 = ch1_header.initial_hist2;
 
     vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
-    vgmstream->ch[1].streamfile = vgmstream->ch[0].streamfile;
+
+    if (channel_count == 2) {
+        vgmstream->ch[1].adpcm_history1_16 = ch1_header.initial_hist1;
+        vgmstream->ch[1].adpcm_history2_16 = ch1_header.initial_hist2;
+        vgmstream->ch[1].streamfile = vgmstream->ch[0].streamfile;
+    }
 
     if (!vgmstream->ch[0].streamfile) goto fail;
     /* open the file for reading */
-    for (i=0;i<2;i++) {
+    for (i=0;i<channel_count;i++) {
         vgmstream->ch[i].channel_start_offset=
             vgmstream->ch[i].offset=start_offset+i*interleave;
     }