diff --git a/src/common/audio/music/music.cpp b/src/common/audio/music/music.cpp
index 9f51591fe..17f6d242e 100644
--- a/src/common/audio/music/music.cpp
+++ b/src/common/audio/music/music.cpp
@@ -90,6 +90,7 @@ EXTERN_CVAR(Float, snd_musicvolume)
 EXTERN_CVAR(Int, snd_mididevice)
 EXTERN_CVAR(Float, mod_dumb_mastervolume)
 EXTERN_CVAR(Float, fluid_gain)
+EXTERN_CVAR(Float, opl_gain)
 EXTERN_CVAR(Float, adl_gain)
 EXTERN_CVAR(Float, opn_gain)
 
diff --git a/src/common/audio/music/music_config.cpp b/src/common/audio/music/music_config.cpp
index 3452f455b..ab12f2fc5 100644
--- a/src/common/audio/music/music_config.cpp
+++ b/src/common/audio/music/music_config.cpp
@@ -120,7 +120,7 @@ CUSTOM_CVAR(Bool, adl_auto_arpeggio, false, CVAR_ARCHIVE | CVAR_VIRTUAL)
 	FORWARD_BOOL_CVAR(adl_auto_arpeggio);
 }
 
-CUSTOM_CVAR(Float, adl_gain, 0.5, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIRTUAL)
+CUSTOM_CVAR(Float, adl_gain, 1.0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIRTUAL)
 {
 	if (!mus_usereplaygain)
 	{
@@ -262,6 +262,20 @@ CUSTOM_CVAR(Bool, opl_fullpan, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIR
 	FORWARD_BOOL_CVAR(opl_fullpan);
 }
 
+CUSTOM_CVAR(Float, opl_gain, 1.0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIRTUAL)
+{
+	if (!mus_usereplaygain)
+	{
+		FORWARD_CVAR(opl_gain);
+	}
+	else
+	{
+		// Replay gain will disable the user setting for consistency.
+		float newval;
+		ChangeMusicSetting(zmusic_opl_gain, mus_playing.handle, 1.0f, & newval);
+	}
+}
+
 #ifndef ZMUSIC_LITE
 //==========================================================================
 //
@@ -315,7 +329,7 @@ CUSTOM_CVAR(Bool, opn_auto_arpeggio, false, CVAR_ARCHIVE | CVAR_VIRTUAL)
 	FORWARD_BOOL_CVAR(adl_auto_arpeggio);
 }
 
-CUSTOM_CVAR(Float, opn_gain, 0.5, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIRTUAL)
+CUSTOM_CVAR(Float, opn_gain, 1.0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIRTUAL)
 {
 	if (!mus_usereplaygain)
 	{
diff --git a/wadsrc/static/menudef.txt b/wadsrc/static/menudef.txt
index 0f31f3972..0e55fd790 100644
--- a/wadsrc/static/menudef.txt
+++ b/wadsrc/static/menudef.txt
@@ -2225,6 +2225,7 @@ OptionMenu ModReplayerOptions protected
  	Title "$ADVSNDMNU_OPLSYNTHESIS"
 	Option "$ADVSNDMNU_OPLCORES", 			"opl_core", "OplCores"
 	Slider "$ADVSNDMNU_OPLNUMCHIPS", 		"opl_numchips", 1, 8, 1, 0
+	Slider "$ADVSNDMNU_OPLGAIN",		 	"opl_gain", 0, 10, 0.1, 1
 	Option "$ADVSNDMNU_OPLFULLPAN",			"opl_fullpan", "OnOff"
  }
 
@@ -2293,7 +2294,7 @@ OptionMenu ModReplayerOptions protected
  OptionMenu ADLOptions protected
  {
 	Title "$ADVSNDMNU_ADLMIDI"
-	Slider "$ADVSNDMNU_FLUIDGAIN",		 "adl_gain", 0, 10, 0.1, 1
+	Slider "$ADVSNDMNU_ADLGAIN",		 "adl_gain", 0, 10, 0.1, 1
 	Option "$ADVSNDMNU_OPLCORES",		 "adl_emulator_id", "ADLOplCores"
 	Option "$ADVSNDMNU_RUNPCMRATE",		 "adl_run_at_pcm_rate", "OnOff"
 	Slider "$ADVSNDMNU_ADLNUMCHIPS", 	 "adl_chips_count", 1, 32, 1, 0
@@ -2312,7 +2313,7 @@ OptionMenu ModReplayerOptions protected
  OptionMenu OPNOptions protected
  {
 	Title "$ADVSNDMNU_OPNMIDI"
-	Slider "$ADVSNDMNU_FLUIDGAIN",		 "opn_gain", 0, 10, 0.1, 1
+	Slider "$ADVSNDMNU_OPNGAIN",		 "opn_gain", 0, 10, 0.1, 1
 	Option "$ADVSNDMNU_OPNCORES",		 "opn_emulator_id", "OpnCores"
 	Option "$ADVSNDMNU_RUNPCMRATE",		 "opn_run_at_pcm_rate", "OnOff"
 	Slider "$ADVSNDMNU_OPNNUMCHIPS", 	 "opn_chips_count", 1, 32, 1, 0