diff --git a/src/burn/drv/midway/narc_sound.cpp b/src/burn/drv/midway/narc_sound.cpp
index c8ce86799..efcdb6162 100644
--- a/src/burn/drv/midway/narc_sound.cpp
+++ b/src/burn/drv/midway/narc_sound.cpp
@@ -17,6 +17,9 @@ static INT32 sound_int_state;
 static INT32 sound_in_reset;
 static UINT8 audio_sync;
 
+static INT32 if_clk;
+static INT32 if_seq;
+
 static void bankswitch(INT32 cpu, INT32 data)
 {
 	INT32 bank = 0x10000 + 0x8000 * (data & 1) + 0x10000 * ((data >> 3) & 1) + 0x20000 * ((data >> 1) & 3);
@@ -134,17 +137,14 @@ static INT32 hc_idlefilter_check(UINT8 in)
 {
 	const UINT8 crap[8] = { 0x01, 0x00, 0x55, 0x2a, 0x15, 0x0a, 0x05, 0x02 };
 
-	static INT32 clk = 0;
-	static INT32 seq = 0;
-
-	if (in == crap[clk]) {
-		clk = (clk + 1) & 7;
-		seq++;
+	if (in == crap[if_clk]) {
+		if_clk = (if_clk + 1) & 7;
+		if_seq++;
 	} else {
-		seq = 0;
+		if_seq = 0;
 	}
 
-	return (seq > 2);
+	return (if_seq > 2);
 }
 
 static void narc_sound1_write(UINT16 address, UINT8 data)
@@ -213,6 +213,9 @@ void narc_sound_reset()
 
 	sound_int_state = 0;
 	sound_in_reset = 0;
+
+	if_clk = 0;
+	if_seq = 0;
 }
 
 void narc_sound_init(UINT8 *rom0, UINT8 *rom1)
@@ -246,6 +249,7 @@ void narc_sound_init(UINT8 *rom0, UINT8 *rom1)
 	BurnTimerAttachM6809(2000000);
 
 	hc55516_init(M6809TotalCycles, 2000000);
+	hc55516_volume(0.60);
 
 	DACInit(0, 0, 1, M6809TotalCycles, 2000000);
 	DACInit(1, 0, 1, M6809TotalCycles, 2000000);
@@ -305,6 +309,9 @@ INT32 narc_sound_scan(INT32 nAction, INT32 *pnMin)
 		SCAN_VAR(bankdata);
 		SCAN_VAR(sound_int_state);
 		SCAN_VAR(sound_in_reset);
+
+		SCAN_VAR(if_clk);
+		SCAN_VAR(if_seq);
 	}
 
 	if (nAction & ACB_WRITE)
diff --git a/src/burn/snd/hc55516.cpp b/src/burn/snd/hc55516.cpp
index d8800de4f..cc3fec0bd 100644
--- a/src/burn/snd/hc55516.cpp
+++ b/src/burn/snd/hc55516.cpp
@@ -44,6 +44,8 @@ static double  m_leak;
 
 static INT32   m_clock = 0; // always 0 for sw-driven clock
 
+static double  volume = 1.0;
+
 static INT16  *m_mixer_buffer; // re-sampler
 
 static INT32 (*pCPUTotalCycles)() = NULL;
@@ -135,6 +137,11 @@ void hc55516_reset()
 	samples_from = (SAMPLE_RATE * 100 + (nBurnFPS >> 1)) / nBurnFPS;
 }
 
+void hc55516_volume(double vol)
+{
+	volume = vol;
+}
+
 void hc55516_scan(INT32 nAction, INT32 *)
 {
 	SCAN_VAR(m_last_clock_state);
@@ -166,6 +173,8 @@ static void start_common(UINT8 _shiftreg_mask, INT32 _active_clock_hi)
 	m_active_clock_hi = _active_clock_hi;
 
 	m_mixer_buffer = (INT16*)BurnMalloc(2 * sizeof(INT16) * SAMPLE_RATE);
+
+	volume = 1.0;
 }
 
 static inline INT32 is_external_oscillator()
@@ -359,10 +368,11 @@ void hc55516_update(INT16 *inputs, INT32 sample_len)
 	{
 		INT32 k = (samples_from * j) / nBurnSoundLen;
 
-		INT32 rlmono = m_mixer_buffer[k];
+		INT32 rlmono = m_mixer_buffer[k] * volume;
+		rlmono = BURN_SND_CLIP(rlmono);
 
-		inputs[0] = BURN_SND_CLIP(inputs[0] + BURN_SND_CLIP(rlmono));
-		inputs[1] = BURN_SND_CLIP(inputs[1] + BURN_SND_CLIP(rlmono));
+		inputs[0] = BURN_SND_CLIP(inputs[0] + rlmono);
+		inputs[1] = BURN_SND_CLIP(inputs[1] + rlmono);
 		inputs += 2;
 	}
 
diff --git a/src/burn/snd/hc55516.h b/src/burn/snd/hc55516.h
index 497a97521..2492d10b2 100644
--- a/src/burn/snd/hc55516.h
+++ b/src/burn/snd/hc55516.h
@@ -13,6 +13,8 @@ void hc55516_exit();
 void hc55516_reset();
 void hc55516_scan(INT32 nAction, INT32 *);
 
+void hc55516_volume(double vol);
+
 void hc55516_clock_w(INT32 state);
 void hc55516_digit_w(INT32 digit);
 INT32 hc55516_clock_state_r();