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Diffstat (limited to 'src/mame/drivers/megazone.cpp')
-rw-r--r--src/mame/drivers/megazone.cpp4
1 files changed, 1 insertions, 3 deletions
diff --git a/src/mame/drivers/megazone.cpp b/src/mame/drivers/megazone.cpp
index 8d08cc9a52d..9644b375cbb 100644
--- a/src/mame/drivers/megazone.cpp
+++ b/src/mame/drivers/megazone.cpp
@@ -73,7 +73,6 @@ REAR BOARD 1C026 N/U (CUSTOM ON ORIGINAL)
#include "sound/ay8910.h"
#include "sound/dac.h"
#include "sound/flt_rc.h"
-#include "sound/volt_reg.h"
#include "screen.h"
#include "speaker.h"
@@ -344,8 +343,7 @@ static MACHINE_CONFIG_START( megazone )
MCFG_SOUND_ROUTE(2, "filter.0.2", 0.30)
MCFG_SOUND_ADD("dac", DAC_8BIT_R2R, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 0.25) // unknown DAC
- MCFG_DEVICE_ADD("vref", VOLTAGE_REGULATOR, 0) MCFG_VOLTAGE_REGULATOR_OUTPUT(5.0)
- MCFG_SOUND_ROUTE_EX(0, "dac", 1.0, DAC_VREF_POS_INPUT) MCFG_SOUND_ROUTE_EX(0, "dac", -1.0, DAC_VREF_NEG_INPUT)
+ MCFG_SOUND_REFERENCE_INPUT(DAC_VREF_POS_INPUT, 1.0) MCFG_SOUND_REFERENCE_INPUT(DAC_VREF_NEG_INPUT, -1.0)
MCFG_FILTER_RC_ADD("filter.0.0", 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 1.0)