diff --git a/sound/fmopl.cpp b/sound/fmopl.cpp
index b6686a89627..06499953987 100644
--- a/sound/fmopl.cpp
+++ b/sound/fmopl.cpp
@@ -1147,6 +1147,11 @@ FM_OPL *makeAdlibOPL(int rate) {
 		env_bits = FMOPL_ENV_BITS_HQ;
 		eg_ent = FMOPL_EG_ENT_HQ;
 	}
+	else
+	if (ConfMan.hasKey("FM_medium_quality") && ConfMan.getBool("FM_medium_quality")) {
+		env_bits = FMOPL_ENV_BITS_MQ;
+		eg_ent = FMOPL_EG_ENT_MQ;
+	}
 	else {
 		env_bits = FMOPL_ENV_BITS_LQ;
 		eg_ent = FMOPL_EG_ENT_LQ;
diff --git a/sound/fmopl.h b/sound/fmopl.h
index 701238dc405..c65fd553ce0 100644
--- a/sound/fmopl.h
+++ b/sound/fmopl.h
@@ -30,8 +30,10 @@
 
 enum {
 	FMOPL_ENV_BITS_HQ = 16,
+	FMOPL_ENV_BITS_MQ = 8,
 	FMOPL_ENV_BITS_LQ = 8,
 	FMOPL_EG_ENT_HQ = 4096,
+	FMOPL_EG_ENT_MQ = 1024,
 	FMOPL_EG_ENT_LQ = 128
 };