diff --git a/src/include/86box/snd_sb_dsp.h b/src/include/86box/snd_sb_dsp.h
index 3e0e40e800..568b02f47f 100644
--- a/src/include/86box/snd_sb_dsp.h
+++ b/src/include/86box/snd_sb_dsp.h
@@ -5,6 +5,11 @@
 #define SB_SUBTYPE_DEFAULT             0 /*Handle as a Creative card*/
 #define SB_SUBTYPE_CLONE_AZT2316A_0X11 1 /*Aztech Sound Galaxy Pro 16 AB, DSP 3.1 - SBPRO2 clone*/
 #define SB_SUBTYPE_CLONE_AZT1605_0X0C  2 /*Aztech Sound Galaxy Nova 16 Extra / Packard Bell Forte 16, DSP 2.1 - SBPRO2 clone*/
+#define SB_SUBTYPE_ESS_ES688           3 /* ESS Technology ES688 */
+#define SB_SUBTYPE_ESS_ES1688          4 /* ESS Technology ES1688 */
+
+/* ESS-related */
+#define IS_ESS(dsp) ((dsp)->sb_subtype >= SB_SUBTYPE_ESS_ES688)
 
 /* aztech-related */
 #define IS_AZTECH(dsp)     ((dsp)->sb_subtype == SB_SUBTYPE_CLONE_AZT2316A_0X11 || (dsp)->sb_subtype == SB_SUBTYPE_CLONE_AZT1605_0X0C) /* check for future AZT cards here */
diff --git a/src/sound/snd_sb_dsp.c b/src/sound/snd_sb_dsp.c
index cf4498b4b0..d94faa29ed 100644
--- a/src/sound/snd_sb_dsp.c
+++ b/src/sound/snd_sb_dsp.c
@@ -906,17 +906,21 @@ sb_exec_command(sb_dsp_t *dsp)
             dsp->sb_8_pause = 1;
             break;
         case 0xD1: /* Speaker on */
-            if (dsp->sb_type < SB15)
-                dsp->sb_8_pause = 1;
-            else if (dsp->sb_type < SB16)
-                dsp->muted = 0;
+            if (!IS_ESS(dsp)) {
+                if (dsp->sb_type < SB15)
+                    dsp->sb_8_pause = 1;
+                else if (dsp->sb_type < SB16)
+                    dsp->muted = 0;
+            }
             dsp->sb_speaker = 1;
             break;
         case 0xD3: /* Speaker off */
-            if (dsp->sb_type < SB15)
-                dsp->sb_8_pause = 1;
-            else if (dsp->sb_type < SB16)
-                dsp->muted = 1;
+            if (!IS_ESS(dsp)) {
+                if (dsp->sb_type < SB15)
+                    dsp->sb_8_pause = 1;
+                else if (dsp->sb_type < SB16)
+                    dsp->muted = 1;
+            }
             dsp->sb_speaker = 0;
             break;
         case 0xD4: /* Continue 8-bit DMA */
@@ -944,6 +948,11 @@ sb_exec_command(sb_dsp_t *dsp)
             sb_add_data(dsp, ~dsp->sb_data[0]);
             break;
         case 0xE1: /* Get DSP version */
+            if (IS_ESS(dsp)) {
+               sb_add_data(dsp, 0x3);
+               sb_add_data(dsp, 0x1);
+               break;
+            }
             if (IS_AZTECH(dsp)) {
                 if (dsp->sb_subtype == SB_SUBTYPE_CLONE_AZT2316A_0X11) {
                     sb_add_data(dsp, 0x3);
@@ -1036,7 +1045,7 @@ sb_write(uint16_t a, uint8_t v, void *priv)
     sb_dsp_t *dsp = (sb_dsp_t *) priv;
 
     /* Sound Blasters prior to Sound Blaster 16 alias the I/O ports. */
-    if (dsp->sb_type < SB16)
+    if (dsp->sb_type < SB16 && (!IS_ESS(dsp) || (IS_ESS(dsp) && ((a & 0xF) != 0xE))))
         a &= 0xfffe;
 
     switch (a & 0xF) {