diff --git a/src/include/86box/snd_ad1848.h b/src/include/86box/snd_ad1848.h
index a7e38a6f8..0656e4d02 100644
--- a/src/include/86box/snd_ad1848.h
+++ b/src/include/86box/snd_ad1848.h
@@ -32,6 +32,14 @@ enum {
     AD1848_TYPE_CS4235  = 6
 };
 
+enum {
+    AD1848_AUX1    = 2,
+    AD1848_AUX2    = 4,
+    AD1848_OUT     = 6,
+    AD1848_LINE_IN = 18,
+    AD1848_MONO    = 26
+};
+
 typedef struct ad1848_t {
     uint8_t type;
     uint8_t index;
@@ -47,6 +55,7 @@ typedef struct ad1848_t {
 
     int16_t out_l;
     int16_t out_r;
+    int8_t  cd_vol_reg;
     double  cd_vol_l;
     double  cd_vol_r;
     int     fm_vol_l;
@@ -86,8 +95,9 @@ extern void    ad1848_write(uint16_t addr, uint8_t val, void *priv);
 
 extern void ad1848_update(ad1848_t *ad1848);
 extern void ad1848_speed_changed(ad1848_t *ad1848);
+extern void ad1848_set_cd_audio_channel(void *priv, int channel);
 extern void ad1848_filter_cd_audio(int channel, double *buffer, void *priv);
-extern void ad1848_filter_aux2(void* priv, double* out_l, double* out_r);
+extern void ad1848_filter_channel(void* priv, int channel, double* out_l, double* out_r);
 
 extern void ad1848_init(ad1848_t *ad1848, uint8_t type);
 
diff --git a/src/include/86box/sound.h b/src/include/86box/sound.h
index 5f91ec9d0..66f426413 100644
--- a/src/include/86box/sound.h
+++ b/src/include/86box/sound.h
@@ -203,9 +203,11 @@ extern const device_t es1373_onboard_device;
 extern const device_t ct5880_device;
 extern const device_t ct5880_onboard_device;
 
-/* Gravis UltraSound and UltraSound Max */
+/* Gravis UltraSound family */
 extern const device_t gus_device;
+extern const device_t gus_v37_device;
 extern const device_t gus_max_device;
+extern const device_t gus_ace_device;
 
 /* IBM PS/1 Audio Card */
 extern const device_t ps1snd_device;
diff --git a/src/qt/languages/86box.pot b/src/qt/languages/86box.pot
index a65578eae..df6f01f3c 100644
--- a/src/qt/languages/86box.pot
+++ b/src/qt/languages/86box.pot
@@ -2136,6 +2136,9 @@ msgstr ""
 msgid "Enable Game port"
 msgstr ""
 
+msgid "Enable Adlib ports"
+msgstr ""
+
 msgid "SID Model"
 msgstr ""
 
diff --git a/src/qt/languages/cs-CZ.po b/src/qt/languages/cs-CZ.po
index ae265593c..6cef7611c 100644
--- a/src/qt/languages/cs-CZ.po
+++ b/src/qt/languages/cs-CZ.po
@@ -2136,6 +2136,9 @@ msgstr "Nízký DMA kanál"
 msgid "Enable Game port"
 msgstr "Povolit herní port"
 
+msgid "Enable Adlib ports"
+msgstr "Povolit porty Adlib"
+
 msgid "SID Model"
 msgstr "Model SID"
 
diff --git a/src/qt/languages/de-DE.po b/src/qt/languages/de-DE.po
index 4385811c0..3b92f7ec3 100644
--- a/src/qt/languages/de-DE.po
+++ b/src/qt/languages/de-DE.po
@@ -2136,6 +2136,9 @@ msgstr "Niedrige DMA"
 msgid "Enable Game port"
 msgstr "Game-Port einschalten"
 
+msgid "Enable Adlib ports"
+msgstr "Adlib-Ports einschalten"
+
 msgid "SID Model"
 msgstr "SID-Modell"
 
diff --git a/src/qt/languages/es-ES.po b/src/qt/languages/es-ES.po
index b3d8835cf..46bd759fe 100644
--- a/src/qt/languages/es-ES.po
+++ b/src/qt/languages/es-ES.po
@@ -2136,6 +2136,9 @@ msgstr "DMA bajo"
 msgid "Enable Game port"
 msgstr "Habilitar puerto de juegos"
 
+msgid "Enable Adlib ports"
+msgstr "Habilitar puertos Adlib"
+
 msgid "SID Model"
 msgstr "Modelo de SID"
 
diff --git a/src/qt/languages/fi-FI.po b/src/qt/languages/fi-FI.po
index 475d94b7b..dc3cae0cf 100644
--- a/src/qt/languages/fi-FI.po
+++ b/src/qt/languages/fi-FI.po
@@ -2136,6 +2136,9 @@ msgstr "Matala DMA"
 msgid "Enable Game port"
 msgstr "Peliportti"
 
+msgid "Enable Adlib ports"
+msgstr "Adlib-portit"
+
 msgid "SID Model"
 msgstr "SID-malli"
 
diff --git a/src/qt/languages/fr-FR.po b/src/qt/languages/fr-FR.po
index 3f28b4af8..c31b4c8a6 100644
--- a/src/qt/languages/fr-FR.po
+++ b/src/qt/languages/fr-FR.po
@@ -2136,6 +2136,9 @@ msgstr "DMA bas"
 msgid "Enable Game port"
 msgstr "Activer le port de jeu"
 
+msgid "Enable Adlib ports"
+msgstr "Activer les ports Adlib"
+
 msgid "SID Model"
 msgstr "Modèle SID"
 
diff --git a/src/qt/languages/hr-HR.po b/src/qt/languages/hr-HR.po
index 4996db404..4f2d8ee93 100644
--- a/src/qt/languages/hr-HR.po
+++ b/src/qt/languages/hr-HR.po
@@ -2136,6 +2136,9 @@ msgstr "Niski DMA"
 msgid "Enable Game port"
 msgstr "Omogoći vrata za igru"
 
+msgid "Enable Adlib ports"
+msgstr "Omogući Adlib portove"
+
 msgid "SID Model"
 msgstr "Model SID-a"
 
diff --git a/src/qt/languages/it-IT.po b/src/qt/languages/it-IT.po
index f0806bf7b..4c0a6722a 100644
--- a/src/qt/languages/it-IT.po
+++ b/src/qt/languages/it-IT.po
@@ -2136,6 +2136,9 @@ msgstr "DMA basso"
 msgid "Enable Game port"
 msgstr "Abilita la porta giochi"
 
+msgid "Enable Adlib ports"
+msgstr "Abilita porte Adlib"
+
 msgid "SID Model"
 msgstr "Modello SID"
 
diff --git a/src/qt/languages/ja-JP.po b/src/qt/languages/ja-JP.po
index be01430f9..2fb7da257 100644
--- a/src/qt/languages/ja-JP.po
+++ b/src/qt/languages/ja-JP.po
@@ -2136,6 +2136,9 @@ msgstr "低DMA"
 msgid "Enable Game port"
 msgstr "ゲームポートを有効にする"
 
+msgid "Enable Adlib ports"
+msgstr "Adlibポートを有効にする"
+
 msgid "SID Model"
 msgstr "SIDモデル"
 
diff --git a/src/qt/languages/ko-KR.po b/src/qt/languages/ko-KR.po
index 14da0ec8b..a9fa55f5b 100644
--- a/src/qt/languages/ko-KR.po
+++ b/src/qt/languages/ko-KR.po
@@ -2136,6 +2136,9 @@ msgstr "낮은 DMA"
 msgid "Enable Game port"
 msgstr "게임 포트 사용"
 
+msgid "Enable Adlib ports"
+msgstr "Adlib 포트 활성화"
+
 msgid "SID Model"
 msgstr "SID 모델"
 
diff --git a/src/qt/languages/nb-NO.po b/src/qt/languages/nb-NO.po
index 8d9f97521..53115d4b1 100644
--- a/src/qt/languages/nb-NO.po
+++ b/src/qt/languages/nb-NO.po
@@ -2136,6 +2136,9 @@ msgstr "Lav DMA"
 msgid "Enable Game port"
 msgstr "Aktiver spillport"
 
+msgid "Enable Adlib ports"
+msgstr "Aktiver Adlib-porter"
+
 msgid "SID Model"
 msgstr "SID-modell"
 
diff --git a/src/qt/languages/nl-NL.po b/src/qt/languages/nl-NL.po
index d28a72651..acc3526ec 100644
--- a/src/qt/languages/nl-NL.po
+++ b/src/qt/languages/nl-NL.po
@@ -2136,6 +2136,9 @@ msgstr "Lage DMA"
 msgid "Enable Game port"
 msgstr "Game-poort inschakelen"
 
+msgid "Enable Adlib ports"
+msgstr "Adlib-poorten inschakelen"
+
 msgid "SID Model"
 msgstr "SID-model"
 
diff --git a/src/qt/languages/pl-PL.po b/src/qt/languages/pl-PL.po
index 2a0cde697..81bedb546 100644
--- a/src/qt/languages/pl-PL.po
+++ b/src/qt/languages/pl-PL.po
@@ -2136,6 +2136,9 @@ msgstr "Niski poziom DMA"
 msgid "Enable Game port"
 msgstr "Włącz port gier"
 
+msgid "Enable Adlib ports"
+msgstr "Włącz porty Adlib"
+
 msgid "SID Model"
 msgstr "Model SID"
 
diff --git a/src/qt/languages/pt-BR.po b/src/qt/languages/pt-BR.po
index 63a17871b..211d39f16 100644
--- a/src/qt/languages/pt-BR.po
+++ b/src/qt/languages/pt-BR.po
@@ -2136,6 +2136,9 @@ msgstr "DMA baixo"
 msgid "Enable Game port"
 msgstr "Ativar a porta do jogo"
 
+msgid "Enable Adlib ports"
+msgstr "Ativar portas Adlib"
+
 msgid "SID Model"
 msgstr "Modelo do SID"
 
diff --git a/src/qt/languages/pt-PT.po b/src/qt/languages/pt-PT.po
index 4c7866f41..bd7894f6e 100644
--- a/src/qt/languages/pt-PT.po
+++ b/src/qt/languages/pt-PT.po
@@ -2136,6 +2136,9 @@ msgstr "DMA baixo"
 msgid "Enable Game port"
 msgstr "Ativar a porta de jogos"
 
+msgid "Enable Adlib ports"
+msgstr "Ativar portas Adlib"
+
 msgid "SID Model"
 msgstr "Modelo do SID"
 
diff --git a/src/qt/languages/ru-RU.po b/src/qt/languages/ru-RU.po
index 904757d74..6535b6603 100644
--- a/src/qt/languages/ru-RU.po
+++ b/src/qt/languages/ru-RU.po
@@ -2136,6 +2136,9 @@ msgstr "Низкий DMA"
 msgid "Enable Game port"
 msgstr "Включить игровой порт"
 
+msgid "Enable Adlib ports"
+msgstr "Включить порты Adlib"
+
 msgid "SID Model"
 msgstr "Модель SID"
 
diff --git a/src/qt/languages/sk-SK.po b/src/qt/languages/sk-SK.po
index 3a5e3b863..20f86033c 100644
--- a/src/qt/languages/sk-SK.po
+++ b/src/qt/languages/sk-SK.po
@@ -2136,6 +2136,9 @@ msgstr "Nízka hodnota DMA"
 msgid "Enable Game port"
 msgstr "Povolenie herného portu"
 
+msgid "Enable Adlib ports"
+msgstr "Povoliť porty Adlib"
+
 msgid "SID Model"
 msgstr "Model SID"
 
diff --git a/src/qt/languages/sl-SI.po b/src/qt/languages/sl-SI.po
index c23024a33..0813e3d83 100644
--- a/src/qt/languages/sl-SI.po
+++ b/src/qt/languages/sl-SI.po
@@ -2136,6 +2136,9 @@ msgstr "Nizki DMA"
 msgid "Enable Game port"
 msgstr "Omogočanje igralnih vrat"
 
+msgid "Enable Adlib ports"
+msgstr "Omogoči vrata Adlib"
+
 msgid "SID Model"
 msgstr "Model SID-a"
 
diff --git a/src/qt/languages/sv-SE.po b/src/qt/languages/sv-SE.po
index 58ead9405..e3db6d3b7 100644
--- a/src/qt/languages/sv-SE.po
+++ b/src/qt/languages/sv-SE.po
@@ -2136,6 +2136,9 @@ msgstr "Låg DMA"
 msgid "Enable Game port"
 msgstr "Aktivera spelport"
 
+msgid "Enable Adlib ports"
+msgstr "Aktivera Adlib-portar"
+
 msgid "SID Model"
 msgstr "SID-modell"
 
diff --git a/src/qt/languages/tr-TR.po b/src/qt/languages/tr-TR.po
index 538cc7af6..65eb47152 100644
--- a/src/qt/languages/tr-TR.po
+++ b/src/qt/languages/tr-TR.po
@@ -2136,6 +2136,9 @@ msgstr "Düşük DMA"
 msgid "Enable Game port"
 msgstr "Gameport'ı etkinleştir"
 
+msgid "Enable Adlib ports"
+msgstr "Adlib bağlantı noktalarını etkinleştir"
+
 msgid "SID Model"
 msgstr "SID Modeli"
 
diff --git a/src/qt/languages/uk-UA.po b/src/qt/languages/uk-UA.po
index c079fc141..79f5763c3 100644
--- a/src/qt/languages/uk-UA.po
+++ b/src/qt/languages/uk-UA.po
@@ -2136,6 +2136,9 @@ msgstr "Низький рівень DMA"
 msgid "Enable Game port"
 msgstr "Увімкнути ігровий порт"
 
+msgid "Enable Adlib ports"
+msgstr "Увімкнути порти Adlib"
+
 msgid "SID Model"
 msgstr "Модель SID"
 
diff --git a/src/qt/languages/vi-VN.po b/src/qt/languages/vi-VN.po
index 0190aee4c..f316c54c2 100644
--- a/src/qt/languages/vi-VN.po
+++ b/src/qt/languages/vi-VN.po
@@ -2136,6 +2136,9 @@ msgstr "DMA thấp"
 msgid "Enable Game port"
 msgstr "Bật cổng trò chơi"
 
+msgid "Enable Adlib ports"
+msgstr "Bật cổng Adlib"
+
 msgid "SID Model"
 msgstr "Mẫu SID"
 
diff --git a/src/qt/languages/zh-CN.po b/src/qt/languages/zh-CN.po
index 7f44fe4fc..31a34da90 100644
--- a/src/qt/languages/zh-CN.po
+++ b/src/qt/languages/zh-CN.po
@@ -2136,6 +2136,9 @@ msgstr "低 DMA"
 msgid "Enable Game port"
 msgstr "启用游戏端口"
 
+msgid "Enable Adlib ports"
+msgstr "启用 Adlib 端口"
+
 msgid "SID Model"
 msgstr "SID 芯片型号"
 
diff --git a/src/qt/languages/zh-TW.po b/src/qt/languages/zh-TW.po
index 21a984ebd..7dcb3638f 100644
--- a/src/qt/languages/zh-TW.po
+++ b/src/qt/languages/zh-TW.po
@@ -2136,6 +2136,9 @@ msgstr "低 DMA"
 msgid "Enable Game port"
 msgstr "啟用遊戲埠"
 
+msgid "Enable Adlib ports"
+msgstr "啟用 Adlib 連接埠"
+
 msgid "SID Model"
 msgstr "SID 型號"
 
diff --git a/src/sound/snd_ad1848.c b/src/sound/snd_ad1848.c
index e9a4390c0..d721691d5 100644
--- a/src/sound/snd_ad1848.c
+++ b/src/sound/snd_ad1848.c
@@ -501,16 +501,16 @@ readonly_x:
             if (updatefreq)
                 ad1848_updatefreq(ad1848);
 
-            temp = (ad1848->type < AD1848_TYPE_CS4231) ? 2 : ((ad1848->type == AD1848_TYPE_CS4231) ? 18 : 4);
-            if (ad1848->regs[temp] & 0x80)
-                ad1848->cd_vol_l = 0;
-            else
-                ad1848->cd_vol_l = ad1848_vols_5bits_aux_gain[ad1848->regs[temp] & 0x1f];
-            temp++;
-            if (ad1848->regs[temp] & 0x80)
-                ad1848->cd_vol_r = 0;
-            else
-                ad1848->cd_vol_r = ad1848_vols_5bits_aux_gain[ad1848->regs[temp] & 0x1f];
+            if (ad1848->cd_vol_reg > -1) {
+                if (ad1848->regs[ad1848->cd_vol_reg] & 0x80)
+                    ad1848->cd_vol_l = 0;
+                else
+                    ad1848->cd_vol_l = ad1848_vols_5bits_aux_gain[ad1848->regs[ad1848->cd_vol_reg] & 0x1f];
+                if (ad1848->regs[ad1848->cd_vol_reg + 1] & 0x80)
+                    ad1848->cd_vol_r = 0;
+                else
+                    ad1848->cd_vol_r = ad1848_vols_5bits_aux_gain[ad1848->regs[ad1848->cd_vol_reg + 1] & 0x1f];
+            }
 
 readonly_i:
             ad1848_log("AD1848: write(I%d, %02X)\n", ad1848->index, val);
@@ -746,6 +746,18 @@ ad1848_poll(void *priv)
     }
 }
 
+void
+ad1848_set_cd_audio_channel(void *priv, int channel)
+{
+    ad1848_t *ad1848 = (ad1848_t *) priv;
+
+    const int max_channel = (ad1848->type >= AD1848_TYPE_CS4231) ? 31 : 15;
+    if (channel > max_channel)
+        channel = max_channel;
+
+    ad1848->cd_vol_reg = channel;
+}
+
 void
 ad1848_filter_cd_audio(int channel, double *buffer, void *priv)
 {
@@ -758,20 +770,24 @@ ad1848_filter_cd_audio(int channel, double *buffer, void *priv)
 }
 
 void
-ad1848_filter_aux2(void *priv, double *out_l, double *out_r)
+ad1848_filter_channel(void *priv, int channel, double *out_l, double *out_r)
 {
     const ad1848_t *ad1848 = (ad1848_t *) priv;
 
-    if (ad1848->regs[4] & 0x80) {
+    const int max_channel = (ad1848->type >= AD1848_TYPE_CS4231) ? 31 : 15;
+    if (channel > max_channel)
+        channel = max_channel;
+
+    if (ad1848->regs[channel] & 0x80) {
         *out_l = 0.0;
     } else {
-        *out_l = ((*out_l) * ad1848_vols_5bits_aux_gain[ad1848->regs[4] & 0x1f]) / 65536.0;
+        *out_l = ((*out_l) * ad1848_vols_5bits_aux_gain[ad1848->regs[channel] & 0x1f]) / 65536.0;
     }
 
-    if (ad1848->regs[5] & 0x80) {
+    if (ad1848->regs[channel + 1] & 0x80) {
         *out_r = 0.0;
     } else {
-        *out_r = ((*out_r) * ad1848_vols_5bits_aux_gain[ad1848->regs[5] & 0x1f]) / 65536.0;
+        *out_r = ((*out_r) * ad1848_vols_5bits_aux_gain[ad1848->regs[channel + 1] & 0x1f]) / 65536.0;
     }
 }
 
@@ -837,6 +853,8 @@ ad1848_init(ad1848_t *ad1848, uint8_t type)
 
     ad1848->out_l = ad1848->out_r = 0;
     ad1848->fm_vol_l = ad1848->fm_vol_r = 65536;
+    ad1848->cd_vol_l = ad1848->cd_vol_r = 65536;
+    ad1848->cd_vol_reg = -1;
     ad1848_updatevolmask(ad1848);
     if (type >= AD1848_TYPE_CS4235)
         ad1848->fmt_mask = 0x50;
diff --git a/src/sound/snd_azt2316a.c b/src/sound/snd_azt2316a.c
index 76bf1b24f..65d10532f 100644
--- a/src/sound/snd_azt2316a.c
+++ b/src/sound/snd_azt2316a.c
@@ -1211,6 +1211,7 @@ azt_init(const device_t *info)
 
     /* wss part */
     ad1848_init(&azt2316a->ad1848, device_get_config_int("codec"));
+    ad1848_set_cd_audio_channel(&azt2316a->ad1848, (device_get_config_int("codec") == AD1848_TYPE_CS4248) ? AD1848_AUX1 : AD1848_LINE_IN);
 
     ad1848_setirq(&azt2316a->ad1848, azt2316a->cur_wss_irq);
     ad1848_setdma(&azt2316a->ad1848, azt2316a->cur_wss_dma);
diff --git a/src/sound/snd_cs423x.c b/src/sound/snd_cs423x.c
index 74382a53b..5905fb64e 100644
--- a/src/sound/snd_cs423x.c
+++ b/src/sound/snd_cs423x.c
@@ -273,8 +273,10 @@ cs423x_write(uint16_t addr, uint8_t val, void *priv)
             }
             switch (dev->regs[3] & 0x0f) {
                 case 0: /* WSS Master Control */
-                    if ((dev->type < CRYSTAL_CS4235) && (val & 0x80))
+                    if ((dev->type < CRYSTAL_CS4235) && (val & 0x80)) {
                         ad1848_init(&dev->ad1848, dev->ad1848_type);
+                        ad1848_set_cd_audio_channel(&dev->ad1848, AD1848_AUX2);
+                    }
                     val = 0x00;
                     break;
 
@@ -865,6 +867,7 @@ cs423x_reset(void *priv)
 
     /* Reset WSS codec. */
     ad1848_init(&dev->ad1848, dev->ad1848_type);
+    ad1848_set_cd_audio_channel(&dev->ad1848, AD1848_AUX2);
 
     /* Reset PnP resource data, state and logical devices. */
     dev->pnp_enable = 1;
diff --git a/src/sound/snd_gus.c b/src/sound/snd_gus.c
index 80ce6781d..8d70e61c5 100644
--- a/src/sound/snd_gus.c
+++ b/src/sound/snd_gus.c
@@ -13,6 +13,7 @@
 #include <86box/io.h>
 #include <86box/midi.h>
 #include <86box/nmi.h>
+#include <86box/gameport.h>
 #include <86box/pic.h>
 #include <86box/sound.h>
 #include "cpu.h"
@@ -43,10 +44,33 @@ enum {
 };
 
 enum {
-    GUS_CLASSIC = 0,
-    GUS_MAX     = 1,
+    GUS_CLASSIC    = 0,
+    GUS_CLASSIC_37 = 1,
+    GUS_MAX        = 2,
+    GUS_ACE        = 3
 };
 
+enum {
+    GUS_ICS2101_MIC_IN  = 0,
+    GUS_ICS2101_LINE_IN = 1,
+    GUS_ICS2101_CD_IN   = 2,
+    GUS_ICS2101_GF1_OUT = 3,
+    GUS_ICS2101_UNUSED  = 4,
+    GUS_ICS2101_MASTER  = 5,
+    GUS_ICS2101_MAX     = 6
+};
+
+typedef struct ics2101_chan_t {
+    uint8_t ctrl[2];
+    double level[2];
+    uint8_t pan;
+} ics2101_chan_t;
+
+typedef struct ics2101_t {
+    uint8_t        addr;
+    ics2101_chan_t channels[GUS_ICS2101_MAX];
+} ics2101_t;
+
 typedef struct gus_t {
     int reset;
 
@@ -120,7 +144,9 @@ typedef struct gus_t {
     uint8_t sb_ctrl;
     int     sb_nmi;
 
+    uint8_t joy_trim;
     uint8_t reg_ctrl;
+    uint8_t jumper;
 
     uint8_t ad_status;
     uint8_t ad_data;
@@ -143,9 +169,13 @@ typedef struct gus_t {
 
     uint8_t usrr;
 
+    void   *gameport;
+
     uint8_t max_ctrl;
 
     ad1848_t ad1848;
+
+    ics2101_t ics2101;
 } gus_t;
 
 static int gus_gf1_irqs[8]  = { -1, 2, 5, 3, 7, 11, 12, 15 };
@@ -159,6 +189,15 @@ int gusfreqs[] = {
 
 double vol16bit[4096];
 
+double ics2101_att[128];
+
+double ics2101_pan[] = { 0.35481, 0.35481, 0.35481, 0.37584, 0.47315, 0.53088, 0.59566, 0.66834,
+                         0.70795,
+                         0.74989, 0.79433, 0.84140, 0.89125, 0.94406, 1.00000, 1.00000, 1.00000 };
+
+void    gus_write(uint16_t addr, uint8_t val, void *priv);
+uint8_t gus_read(uint16_t addr, void *priv);
+
 void
 gus_update_int_status(gus_t *gus)
 {
@@ -255,6 +294,10 @@ gus_write(uint16_t addr, uint8_t val, void *priv)
     uint16_t port;
     uint16_t csioport;
 
+    ics2101_t *ics2101 = &gus->ics2101;
+    uint8_t    mixer_ch;
+    uint8_t    mixer_lr;
+
     if ((addr == 0x388) || (addr == 0x389))
         port = addr;
     else
@@ -537,6 +580,10 @@ gus_write(uint16_t addr, uint8_t val, void *priv)
                     gus->t2on          = 1;
                     break;
 
+                case 0x4B: /*Joystick trim DAC*/
+                    gus->joy_trim = val;
+                    break;
+
                 case 0x4c: /*Reset*/
                     gus->reset = val;
                     break;
@@ -634,9 +681,25 @@ gus_write(uint16_t addr, uint8_t val, void *priv)
                     gus->gp2_addr = val;
                     break;
                 case 5:
-                    gus->usrr = 0;
+                    if (gus->type > GUS_CLASSIC)
+                        gus->usrr = 0;
                     break;
                 case 6:
+                    if (gus->type > GUS_CLASSIC) {
+                        if (gus->type != GUS_ACE) {
+                            if (!(val & 0x2) && (gus->jumper & 0x2))
+                                io_removehandler(0x0100 + gus->base, 0x0002, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
+                            else if ((val & 0x2) && !(gus->jumper & 0x2))
+                                io_sethandler(0x0100 + gus->base, 0x0002, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
+
+                            if (!(val & 0x4) && (gus->jumper & 0x4))
+                                gameport_remap(gus->gameport, 0x0);
+                            else if ((val & 0x4) && !(gus->jumper & 0x4))
+                                gameport_remap(gus->gameport, 0x201);
+                        }
+
+                        gus->jumper = val;
+                    }
                     break;
 
                 default:
@@ -672,11 +735,47 @@ gus_write(uint16_t addr, uint8_t val, void *priv)
             gus->sb_2xe = val;
             break;
         case 0x20f:
-            gus->reg_ctrl = val;
+            if (gus->type > GUS_CLASSIC)
+               gus->reg_ctrl = val;
             break;
         case 0x306:
+            if (gus->type == GUS_CLASSIC_37) {
+                mixer_ch = (ics2101->addr >> 3) & 0x7; /* current attenuator */
+                mixer_lr = ics2101->addr & 1; /* left or right channel */
+                switch (ics2101->addr & 0x6) {
+                    case 0: /* Set control */
+                        ics2101->channels[mixer_ch].ctrl[mixer_lr] = val & 0xF;
+                        if ((mixer_lr == 0) && (val & 0xC)) /* copy to right channel if not normal mode */
+                            ics2101->channels[mixer_ch].ctrl[1] = val & 0xF;
+                        break;
+                    case 2: /* Set attenuator */
+                        switch (ics2101->channels[mixer_ch].ctrl[mixer_lr] & 0xC) {
+                            case 0: /* Normal mode */
+                                ics2101->channels[mixer_ch].level[mixer_lr] = ics2101_att[val & 0x7F];
+                                break;
+                            case 4: /* Stereo mode */
+                                ics2101->channels[mixer_ch].level[0] = ics2101_att[val & 0x7F];
+                                ics2101->channels[mixer_ch].level[1] = ics2101_att[val & 0x7F];
+                                break;
+                            case 8: /* Balance/Pan mode */
+                                ics2101->channels[mixer_ch].level[0] = ics2101_att[val & 0x7F] * ics2101_pan[ics2101->channels[mixer_ch].pan + 1];
+                                ics2101->channels[mixer_ch].level[1] = ics2101_att[val & 0x7F] * ics2101_pan[16 - ics2101->channels[mixer_ch].pan];
+                                break;
+                        }
+                        break;
+                    case 4: /* Set panning */
+                        ics2101->channels[mixer_ch].pan = val & 0xF;
+                        break;
+                    default:
+                        break;
+                }
+                break;
+            }
+            fallthrough;
         case 0x706:
-            if (gus->type == GUS_MAX) {
+            if (gus->type == GUS_CLASSIC_37) {
+                gus->ics2101.addr = val & 0x3F;
+            } else if (gus->type == GUS_MAX) {
                 if (gus->dma >= 4)
                     val |= 0x10;
                 if (gus->dma2 >= 4)
@@ -746,10 +845,10 @@ gus_read(uint16_t addr, void *priv)
             return val;
 
         case 0x20F:
-            if (gus->type == GUS_MAX)
-                val = 0x02;
+            if (gus->type > GUS_CLASSIC)
+                val = gus->jumper;
             else
-                val = 0x00;
+                val = 0xff;
             break;
 
         case 0x302:
@@ -842,6 +941,9 @@ gus_read(uint16_t addr, void *priv)
                 case 0x49: /*Sampling control*/
                     return 0;
 
+                case 0x4B: /*Joystick trim DAC*/
+                    return gus->joy_trim;
+
                 case 0x00:
                 case 0x01:
                 case 0x02:
@@ -867,10 +969,14 @@ gus_read(uint16_t addr, void *priv)
             break;
         case 0x306:
         case 0x706:
-            if (gus->type == GUS_MAX)
+            if (gus->type == GUS_CLASSIC_37)
+                val = 0x06; /* 3.7x - mixer, no reverse channels bug */
+            else if (gus->type == GUS_MAX)
                 val = 0x0a; /* GUS MAX */
+            else if (gus->type == GUS_ACE)
+                val = 0x30; /* GUS ACE */
             else
-                val = 0xff; /*Pre 3.7 - no mixer*/
+                val = 0xff; /* Pre 3.7 - no mixer */
             break;
 
         case 0x307: /*DRAM access*/
@@ -884,22 +990,24 @@ gus_read(uint16_t addr, void *priv)
             return 0;
 
         case 0x20b:
-            switch (gus->reg_ctrl & 0x07) {
-                case 1:
-                    val = gus->gp1;
-                    break;
-                case 2:
-                    val = gus->gp2;
-                    break;
-                case 3:
-                    val = gus->gp1_addr;
-                    break;
-                case 4:
-                    val = gus->gp2_addr;
-                    break;
+            if (gus->type > GUS_CLASSIC) {
+                switch (gus->reg_ctrl & 0x07) {
+                    case 1:
+                        val = gus->gp1;
+                        break;
+                    case 2:
+                        val = gus->gp2;
+                        break;
+                    case 3:
+                        val = gus->gp1_addr;
+                        break;
+                    case 4:
+                        val = gus->gp2_addr;
+                        break;
 
-                default:
-                    break;
+                    default:
+                        break;
+                }
             }
             break;
 
@@ -911,8 +1019,11 @@ gus_read(uint16_t addr, void *priv)
         case 0x20e:
             return gus->sb_2xe;
 
-        case 0x208:
         case 0x388:
+            if ((gus->type == GUS_ACE) && !device_get_config_int("adlib_ports"))
+                break;
+            fallthrough;
+        case 0x208:
             if (gus->tctrl & GUS_TIMER_CTRL_AUTO)
                 val = gus->sb_2xa;
             else {
@@ -927,10 +1038,12 @@ gus_read(uint16_t addr, void *priv)
 #ifdef OLD_NMI_BEHAVIOR
             nmi = 0;
 #endif /* OLD_NMI_BEHAVIOR */
-            fallthrough;
-        case 0x389:
             val = gus->ad_data;
             break;
+        case 0x389:
+            if ((gus->type != GUS_ACE) || device_get_config_int("adlib_ports"))
+                val = gus->ad_data;
+            break;
 
         case 0x20A:
             val = gus->adcommand;
@@ -1164,6 +1277,58 @@ gus_poll_wave(void *priv)
         gus_update_int_status(gus);
 }
 
+void
+gus_ics2101_filter(void *priv, int channel, double *out_l, double *out_r)
+{
+    ics2101_t *ics2101 = (ics2101_t *) priv;
+
+    double temp_l = 0.0;
+    double temp_r = 0.0;
+    double master_l = 0.0;
+    double master_r = 0.0;
+
+    uint8_t ctrl_l = ics2101->channels[channel].ctrl[0];
+    uint8_t ctrl_r = ics2101->channels[channel].ctrl[1];
+    if (!(ctrl_l & 0xC)) { /* Normal mode */
+        if (ctrl_l & 1)
+            temp_l += *out_l * ics2101->channels[channel].level[0];
+        if (ctrl_l & 2)
+            temp_r += *out_l * ics2101->channels[channel].level[0];
+        if (ctrl_r & 1)
+            temp_l += *out_r * ics2101->channels[channel].level[1];
+        if (ctrl_r & 2)
+            temp_r += *out_r * ics2101->channels[channel].level[1];
+    } else { /* Stereo or Balance/Pan mode */
+        if (ctrl_l & 2) { /* Mono/Pan */
+            temp_l = (*out_l + *out_r) * 0.5 * ics2101->channels[channel].level[(ctrl_l & 1)];
+            temp_r = (*out_r + *out_l) * 0.5 * ics2101->channels[channel].level[!(ctrl_l & 1)];
+        } else { /* Stereo/Balance */
+            temp_l = ((ctrl_l & 1) ? *out_l : *out_r) * ics2101->channels[channel].level[(ctrl_l & 1)];
+            temp_r = ((ctrl_l & 1) ? *out_r : *out_l) * ics2101->channels[channel].level[!(ctrl_l & 1)];
+        }
+    }
+
+    /* Master */
+    ctrl_l = ics2101->channels[GUS_ICS2101_MASTER].ctrl[0];
+    ctrl_r = ics2101->channels[GUS_ICS2101_MASTER].ctrl[1];
+    if (!(ctrl_l & 0xC)) { /* Normal mode */
+        if (ctrl_l & 1)
+            master_l += temp_l * ics2101->channels[GUS_ICS2101_MASTER].level[0];
+        if (ctrl_l & 2)
+            master_r += temp_l * ics2101->channels[GUS_ICS2101_MASTER].level[0];
+        if (ctrl_r & 1)
+            master_l += temp_r * ics2101->channels[GUS_ICS2101_MASTER].level[1];
+        if (ctrl_r & 2)
+            master_r += temp_r * ics2101->channels[GUS_ICS2101_MASTER].level[1];
+    } else { /* Stereo or Balance mode - no mono/pan for master */
+        master_l = ((ctrl_l & 1) ? temp_l : temp_r) * ics2101->channels[GUS_ICS2101_MASTER].level[(ctrl_l & 1)];
+        master_r = ((ctrl_l & 1) ? temp_r : temp_l) * ics2101->channels[GUS_ICS2101_MASTER].level[!(ctrl_l & 1)];
+    }
+
+    *out_l = master_l;
+    *out_r = master_r;
+}
+
 static void
 gus_get_buffer(int32_t *buffer, int len, void *priv)
 {
@@ -1173,11 +1338,26 @@ gus_get_buffer(int32_t *buffer, int len, void *priv)
         ad1848_update(&gus->ad1848);
 
     gus_update(gus);
-
-    for (int c = 0; c < len * 2; c++) {
-        if ((gus->type == GUS_MAX) && (gus->max_ctrl))
-            buffer[c] += (int32_t) (gus->ad1848.buffer[c] / 2);
-        buffer[c] += (int32_t) gus->buffer[c & 1][c >> 1];
+    for (int c = 0; c < len * 2; c += 2) {
+        double temp_l = 0.0;
+        double temp_r = 0.0;
+        if ((gus->type == GUS_CLASSIC_37) || (gus->type == GUS_MAX)) {
+            temp_l = (double) gus->buffer[0][c >> 1];
+            temp_r = (double) gus->buffer[1][c >> 1];
+            if (gus->type == GUS_MAX) {
+                if (gus->max_ctrl) {
+                    buffer[c]     += (int32_t) (gus->ad1848.buffer[c] / 2);
+                    buffer[c + 1] += (int32_t) (gus->ad1848.buffer[c + 1] / 2);
+                }
+                ad1848_filter_channel(&gus->ad1848, AD1848_AUX1, &temp_l, &temp_r);
+            } else
+                gus_ics2101_filter(&gus->ics2101, GUS_ICS2101_GF1_OUT, &temp_l, &temp_r);
+            buffer[c]     += (int32_t) temp_l;
+            buffer[c + 1] += (int32_t) temp_r;
+        } else {
+            buffer[c]     += (int32_t) gus->buffer[0][c >> 1];
+            buffer[c + 1] += (int32_t) gus->buffer[1][c >> 1];
+        }
     }
 
     if ((gus->type == GUS_MAX) && (gus->max_ctrl))
@@ -1186,6 +1366,17 @@ gus_get_buffer(int32_t *buffer, int len, void *priv)
     gus->pos = 0;
 }
 
+void
+gus_filter_cd_audio(int channel, double *buffer, void *priv)
+{
+    const gus_t *gus = (gus_t *) priv;
+    /* FIXME: No channel remapping possible with the current architecture */
+    if (gus->ics2101.channels[GUS_ICS2101_CD_IN].ctrl[channel] && gus->ics2101.channels[GUS_ICS2101_MASTER].ctrl[channel])
+        *buffer *= gus->ics2101.channels[GUS_ICS2101_CD_IN].level[channel] * gus->ics2101.channels[GUS_ICS2101_MASTER].level[channel];
+    else
+        *buffer *= 0.0;
+}
+
 static void
 gus_input_msg(void *priv, uint8_t *msg, uint32_t len)
 {
@@ -1292,6 +1483,7 @@ gus_reset(void *priv)
     gus->sb_ctrl = 0;
     gus->sb_nmi = 0;
 
+    gus->joy_trim = 29;
     gus->reg_ctrl = 0;
 
     gus->ad_status = 0;
@@ -1320,6 +1512,13 @@ gus_reset(void *priv)
     gus->irq_state = 0;
     gus->midi_irq_state = 0;
 
+    for (int i = 0; i < GUS_ICS2101_MAX; i++) {
+        gus->ics2101.channels[i].level[0] = gus->ics2101.channels[i].level[1] = 1.0;
+        gus->ics2101.channels[i].ctrl[0] = 1;
+        gus->ics2101.channels[i].ctrl[1] = 2;
+        gus->ics2101.channels[i].pan = 7;
+    }
+
     gus_update_int_status(gus);
 }
 
@@ -1328,6 +1527,7 @@ gus_init(UNUSED(const device_t *info))
 {
     int     c;
     double  out     = 1.0;
+    double  gain;
     uint8_t gus_ram = device_get_config_int("gus_ram");
     gus_t  *gus     = calloc(1, sizeof(gus_t));
 
@@ -1355,15 +1555,46 @@ gus_init(UNUSED(const device_t *info))
 
     gus->type = info->local;
 
+    gus->jumper = 0x06;
+
+    for (int i = 0; i < GUS_ICS2101_MAX; i++) {
+        gus->ics2101.channels[i].level[0] = gus->ics2101.channels[i].level[1] = 1.0;
+        gus->ics2101.channels[i].ctrl[0] = 1;
+        gus->ics2101.channels[i].ctrl[1] = 2;
+        gus->ics2101.channels[i].pan = 7;
+    }
+
     gus->base = device_get_config_hex16("base");
 
     io_sethandler(gus->base, 0x0010, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
-    io_sethandler(0x0100 + gus->base, 0x0010, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
+    if (gus->type != GUS_ACE)
+        io_sethandler(0x0100 + gus->base, 0x0002, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
+    io_sethandler(0x0102 + gus->base, 0x000e, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
     io_sethandler(0x0506 + gus->base, 0x0001, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
     io_sethandler(0x0388, 0x0002, gus_read, NULL, NULL, gus_write, NULL, NULL, gus);
+    if (gus->type == GUS_CLASSIC && device_get_config_int("gameport"))
+        gus->gameport = gameport_add(&gameport_201_device);
+    else if (gus->type != GUS_ACE) {
+        gus->gameport = gameport_add(&gameport_pnp_1io_device);
+        gameport_remap(gus->gameport, 0x201);
+    }
+
+    if (gus->type == GUS_CLASSIC_37) {
+        /* Precalculate the attenuation table for ICS2101 */
+        for (int i = 0; i < 128; i++) {
+            gain = (127 - i) * -0.5;
+            if (i < 16)
+                for (int j = 0; j < (16 - i); j++)
+                    gain += -0.5 - 0.13603 * (j + 1);
+            ics2101_att[i] = pow(10.0, gain / 20.0);
+        }
+
+        sound_set_cd_audio_filter(gus_filter_cd_audio, gus);
+    }
 
     if (gus->type == GUS_MAX) {
         ad1848_init(&gus->ad1848, AD1848_TYPE_CS4231);
+        ad1848_set_cd_audio_channel(&gus->ad1848, AD1848_AUX2);
         ad1848_setirq(&gus->ad1848, 5);
         ad1848_setdma(&gus->ad1848, 3);
         io_sethandler(0x10C + gus->base, 4,
@@ -1376,7 +1607,7 @@ gus_init(UNUSED(const device_t *info))
 
     sound_add_handler(gus_get_buffer, gus);
 
-    if (device_get_config_int("receive_input"))
+    if ((gus->type != GUS_ACE) && (device_get_config_int("receive_input")))
         midi_in_handler(1, gus_input_msg, gus_input_sysex, gus);
 
     return gus;
@@ -1442,6 +1673,17 @@ static const device_config_t gus_config[] = {
         },
         .bios           = { { 0 } }
     },
+    {
+        .name           = "gameport",
+        .description    = "Enable Game port",
+        .type           = CONFIG_BINARY,
+        .default_string = NULL,
+        .default_int    = 0,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = { { 0 } },
+        .bios           = { { 0 } }
+    },
     {
         .name           = "receive_input",
         .description    = "Receive MIDI input",
@@ -1457,6 +1699,160 @@ static const device_config_t gus_config[] = {
 // clang-format off
 };
 
+static const device_config_t gus_v37_config[] = {
+    // clang-format off
+    {
+        .name           = "base",
+        .description    = "Address",
+        .type           = CONFIG_HEX16,
+        .default_string = NULL,
+        .default_int    = 0x220,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = {
+            { .description = "210H", .value = 0x210 },
+            { .description = "220H", .value = 0x220 },
+            { .description = "230H", .value = 0x230 },
+            { .description = "240H", .value = 0x240 },
+            { .description = "250H", .value = 0x250 },
+            { .description = "260H", .value = 0x260 },
+            { NULL                                  }
+        },
+        .bios           = { { 0 } }
+    },
+    {
+        .name           = "gus_ram",
+        .description    = "Memory size",
+        .type           = CONFIG_SELECTION,
+        .default_string = NULL,
+        .default_int    = 0,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = {
+            { .description = "256 KB", .value = 0 },
+            { .description = "512 KB", .value = 1 },
+            { .description = "1 MB",   .value = 2 },
+            { NULL                                }
+        },
+        .bios           = { { 0 } }
+    },
+    {
+        .name           = "receive_input",
+        .description    = "Receive MIDI input",
+        .type           = CONFIG_BINARY,
+        .default_string = NULL,
+        .default_int    = 1,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = { { 0 } },
+        .bios           = { { 0 } }
+    },
+    { .name = "", .description = "", .type = CONFIG_END }
+// clang-format off
+};
+
+static const device_config_t gus_max_config[] = {
+    // clang-format off
+    {
+        .name           = "base",
+        .description    = "Address",
+        .type           = CONFIG_HEX16,
+        .default_string = NULL,
+        .default_int    = 0x220,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = {
+            { .description = "210H", .value = 0x210 },
+            { .description = "220H", .value = 0x220 },
+            { .description = "230H", .value = 0x230 },
+            { .description = "240H", .value = 0x240 },
+            { .description = "250H", .value = 0x250 },
+            { .description = "260H", .value = 0x260 },
+            { NULL                                  }
+        },
+        .bios           = { { 0 } }
+    },
+    {
+        .name           = "gus_ram",
+        .description    = "Memory size",
+        .type           = CONFIG_SELECTION,
+        .default_string = NULL,
+        .default_int    = 1,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = {
+            { .description = "512 KB", .value = 1 },
+            { .description = "1 MB",   .value = 2 },
+            { NULL                                }
+        },
+        .bios           = { { 0 } }
+    },
+    {
+        .name           = "receive_input",
+        .description    = "Receive MIDI input",
+        .type           = CONFIG_BINARY,
+        .default_string = NULL,
+        .default_int    = 1,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = { { 0 } },
+        .bios           = { { 0 } }
+    },
+    { .name = "", .description = "", .type = CONFIG_END }
+// clang-format off
+};
+
+static const device_config_t gus_ace_config[] = {
+    // clang-format off
+    {
+        .name           = "base",
+        .description    = "Address",
+        .type           = CONFIG_HEX16,
+        .default_string = NULL,
+        .default_int    = 0x260,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = {
+            { .description = "210H", .value = 0x210 },
+            { .description = "220H", .value = 0x220 },
+            { .description = "230H", .value = 0x230 },
+            { .description = "240H", .value = 0x240 },
+            { .description = "250H", .value = 0x250 },
+            { .description = "260H", .value = 0x260 },
+            { NULL                                  }
+        },
+        .bios           = { { 0 } }
+    },
+    {
+        .name           = "gus_ram",
+        .description    = "Memory size",
+        .type           = CONFIG_SELECTION,
+        .default_string = NULL,
+        .default_int    = 1,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = {
+            { .description = "512 KB", .value = 1 },
+            { .description = "1 MB",   .value = 2 },
+            { NULL                                }
+        },
+        .bios           = { { 0 } }
+    },
+    {
+        .name           = "adlib_ports",
+        .description    = "Enable Adlib ports",
+        .type           = CONFIG_BINARY,
+        .default_string = NULL,
+        .default_int    = 0,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = { { 0 } },
+        .bios           = { { 0 } }
+    },
+    { .name = "", .description = "", .type = CONFIG_END }
+// clang-format off
+};
+
 const device_t gus_device = {
     .name          = "Gravis UltraSound",
     .internal_name = "gus",
@@ -1471,6 +1867,20 @@ const device_t gus_device = {
     .config        = gus_config
 };
 
+const device_t gus_v37_device = {
+    .name          = "Gravis UltraSound (rev 3.7)",
+    .internal_name = "gusv37",
+    .flags         = DEVICE_ISA16,
+    .local         = GUS_CLASSIC_37,
+    .init          = gus_init,
+    .close         = gus_close,
+    .reset         = gus_reset,
+    .available     = NULL,
+    .speed_changed = gus_speed_changed,
+    .force_redraw  = NULL,
+    .config        = gus_v37_config
+};
+
 const device_t gus_max_device = {
     .name          = "Gravis UltraSound MAX",
     .internal_name = "gusmax",
@@ -1482,5 +1892,19 @@ const device_t gus_max_device = {
     .available     = NULL,
     .speed_changed = gus_speed_changed,
     .force_redraw  = NULL,
-    .config        = gus_config
+    .config        = gus_max_config
+};
+
+const device_t gus_ace_device = {
+    .name          = "Gravis UltraSound ACE",
+    .internal_name = "gusace",
+    .flags         = DEVICE_ISA16,
+    .local         = GUS_ACE,
+    .init          = gus_init,
+    .close         = gus_close,
+    .reset         = gus_reset,
+    .available     = NULL,
+    .speed_changed = gus_speed_changed,
+    .force_redraw  = NULL,
+    .config        = gus_ace_config
 };
diff --git a/src/sound/snd_optimc.c b/src/sound/snd_optimc.c
index d0b05741a..274bbd568 100644
--- a/src/sound/snd_optimc.c
+++ b/src/sound/snd_optimc.c
@@ -85,7 +85,7 @@ optimc_filter_opl(void *priv, double *out_l, double *out_r)
     if (optimc->cur_wss_enabled) {
         *out_l /= optimc->sb->mixer_sbpro.fm_l;
         *out_r /= optimc->sb->mixer_sbpro.fm_r;
-        ad1848_filter_aux2((void *) &optimc->ad1848, out_l, out_r);
+        ad1848_filter_channel((void *) &optimc->ad1848, AD1848_AUX2, out_l, out_r);
     }
 }
 
@@ -380,6 +380,7 @@ optimc_init(const device_t *info)
     else
         ad1848_init(&optimc->ad1848, AD1848_TYPE_DEFAULT);
 
+    ad1848_set_cd_audio_channel(&optimc->ad1848, (info->local & 0x100) ? AD1848_LINE_IN : AD1848_AUX1);
     ad1848_setirq(&optimc->ad1848, optimc->cur_wss_irq);
     ad1848_setdma(&optimc->ad1848, optimc->cur_wss_dma);
 
diff --git a/src/sound/sound.c b/src/sound/sound.c
index 579056359..c2e32a7da 100644
--- a/src/sound/sound.c
+++ b/src/sound/sound.c
@@ -138,7 +138,9 @@ static const SOUND_CARD sound_cards[] = {
     { &cs4235_device                },
     { &cs4236b_device               },
     { &gus_device                   },
+    { &gus_v37_device               },
     { &gus_max_device               },
+    { &gus_ace_device               },
     { &mirosound_pcm10_device       },
     { &pas16_device                 },
     { &pas16d_device                },