diff --git a/src/include/86box/snd_sb_dsp.h b/src/include/86box/snd_sb_dsp.h
index 6f94a98019..f04734ebb0 100644
--- a/src/include/86box/snd_sb_dsp.h
+++ b/src/include/86box/snd_sb_dsp.h
@@ -142,6 +142,7 @@ typedef struct sb_dsp_t {
 
     uint8_t ess_regs[256]; /* ESS registers. */
     uint8_t ess_playback_mode;
+    uint8_t ess_extended_mode;
 
     mpu_t *mpu;
 } sb_dsp_t;
diff --git a/src/sound/snd_sb_dsp.c b/src/sound/snd_sb_dsp.c
index 12b04a008e..08a69ec825 100644
--- a/src/sound/snd_sb_dsp.c
+++ b/src/sound/snd_sb_dsp.c
@@ -610,6 +610,13 @@ sb_exec_command(sb_dsp_t *dsp)
     if (dsp->sb_type >= SB16)
         dsp->sb_8051_ram[0x20] = dsp->sb_command;
 
+    if (IS_ESS(dsp)) {
+        if (dsp->sb_command == 0xC6 || dsp->sb_command == 0xC7){
+            dsp->ess_extended_mode = !!(dsp->sb_command == 0xC6);
+            return;
+        }
+    }
+
     switch (dsp->sb_command) {
         case 0x01: /* ???? */
             if (dsp->sb_type >= SB16)