diff --git a/src/mame/audio/8080bw.c b/src/mame/audio/8080bw.c
index ec0dcc015ea..219cd2ff7c5 100644
--- a/src/mame/audio/8080bw.c
+++ b/src/mame/audio/8080bw.c
@@ -713,9 +713,8 @@ DISCRETE_SOUND_START(schaser)
 	/************************************************/
 	DISCRETE_INPUT_LOGIC  (SCHASER_DOT_EN)
 	DISCRETE_INPUT_LOGIC  (SCHASER_DOT_SEL)
-//  Change the constant to the stream input when working.
-	DISCRETE_CONSTANT(SCHASER_EXP_STREAM, 0)
-//  DISCRETE_INPUTX_STREAM(SCHASER_EXP_STREAM,   5.0/36764,              0)
+	// scale to 0-3.5V
+	DISCRETE_INPUTX_STREAM(SCHASER_EXP_STREAM, 0, 1.0/14100,             2.323)
 	DISCRETE_INPUTX_LOGIC (SCHASER_MUSIC_BIT,    DEFAULT_TTL_V_LOGIC_1,  0,      0.0)
 	DISCRETE_INPUT_LOGIC  (SCHASER_SND_EN)
 
@@ -757,7 +756,7 @@ DISCRETE_SOUND_START(schaser)
 	/************************************************/
 	DISCRETE_ADDER3(NODE_90, SCHASER_SND_EN, SCHASER_DOT_SND, SCHASER_EXP_SND, SCHASER_MUSIC_SND)
 
-	DISCRETE_OUTPUT(NODE_90, 60000)
+	DISCRETE_OUTPUT(NODE_90, 33080)
 DISCRETE_SOUND_END
 
 static const double schaser_effect_rc[8] =
diff --git a/src/mame/drivers/8080bw.c b/src/mame/drivers/8080bw.c
index 0acd6bdc87f..e422bfcd394 100644
--- a/src/mame/drivers/8080bw.c
+++ b/src/mame/drivers/8080bw.c
@@ -810,8 +810,7 @@ static MACHINE_DRIVER_START( schaser )
 
 	MDRV_SOUND_ADD("sn", SN76477, 0)
 	MDRV_SOUND_CONFIG(schaser_sn76477_interface)
-	// This will be routed to the discrete system when that feature is working.
-	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+	MDRV_SOUND_ROUTE_EX(0, "discrete", 1.0, 0)
 
 	MDRV_SOUND_ADD("discrete", DISCRETE, 0)
 	MDRV_SOUND_CONFIG_DISCRETE(schaser)
@@ -2413,8 +2412,8 @@ GAME( 1979, desterth, lrescue,  lrescue,  invrvnge, 0, ROT270, "bootleg", "Desti
 GAME( 1979, invadpt2, 0,        invadpt2, invadpt2, 0, ROT270, "Taito", "Space Invaders Part II (Taito)", 0 )
 GAME( 1980, invaddlx, invadpt2, invaders, invadpt2, 0, ROT270, "Midway", "Space Invaders Deluxe", 0 )
 GAME( 1979, cosmo,    0,        cosmo,    cosmo,    0, ROT90,  "TDS & Mints", "Cosmo", GAME_IMPERFECT_SOUND )
-GAME( 1979, schaser,  0,        schaser,  schaser,  0, ROT270, "Taito", "Space Chaser", GAME_IMPERFECT_SOUND| GAME_IMPERFECT_COLORS )
-GAME( 1979, schasrcv, schaser,  schasrcv, schasrcv, 0, ROT270, "Taito", "Space Chaser (CV version)", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_COLORS )
+GAME( 1979, schaser,  0,        schaser,  schaser,  0, ROT270, "Taito", "Space Chaser", GAME_IMPERFECT_COLORS )
+GAME( 1979, schasrcv, schaser,  schasrcv, schasrcv, 0, ROT270, "Taito", "Space Chaser (CV version)", GAME_IMPERFECT_COLORS )
 GAME( 1979, sflush,   0,        sflush,   sflush,   0, ROT270, "Taito", "Straight Flush",GAME_NO_SOUND| GAME_IMPERFECT_COLORS | GAME_NO_COCKTAIL)
 GAME( 1980, lupin3,   0,        lupin3,   lupin3,   0, ROT270, "Taito", "Lupin III", GAME_IMPERFECT_SOUND | GAME_NO_COCKTAIL )
 GAME( 1980, polaris,  0,        polaris,  polaris,  0, ROT270, "Taito", "Polaris (set 1)", 0 )