diff --git a/src/mess/audio/upd1771.c b/src/mess/audio/upd1771.c
index 0d72ebcc073..7978605ba17 100644
--- a/src/mess/audio/upd1771.c
+++ b/src/mess/audio/upd1771.c
@@ -223,31 +223,11 @@ const device_type UPD1771C = &device_creator<upd1771c_device>;
 
 upd1771c_device::upd1771c_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
 				: device_t(mconfig, UPD1771C, "NEC uPD1771C 017", tag, owner, clock, "upd1771c", __FILE__),
-					device_sound_interface(mconfig, *this)
+					device_sound_interface(mconfig, *this),
+					m_ack_handler(*this)
 {
 }
 
-
-//-------------------------------------------------
-//  device_config_complete - perform any
-//  operations now that the configuration is
-//  complete
-//-------------------------------------------------
-
-void upd1771c_device::device_config_complete()
-{
-	// inherit a copy of the static data
-	const upd1771_interface *intf = reinterpret_cast<const upd1771_interface *>(static_config());
-	if (intf != NULL)
-		*static_cast<upd1771_interface *>(this) = *intf;
-
-	// or initialize to defaults if none provided
-	else
-	{
-		memset(&m_ack_callback, 0, sizeof(m_ack_callback));
-	}
-}
-
 //-------------------------------------------------
 //  device_start - device-specific startup
 //-------------------------------------------------
@@ -255,7 +235,7 @@ void upd1771c_device::device_config_complete()
 void upd1771c_device::device_start()
 {
 	/* resolve callbacks */
-	m_ack_out_func.resolve(m_ack_callback, *this);
+	m_ack_handler.resolve();
 
 	m_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(upd1771c_device::ack_callback),this));
 
@@ -374,7 +354,7 @@ WRITE8_MEMBER( upd1771c_device::write )
 	//if (LOG)
 	//  logerror( "upd1771_w: received byte 0x%02x\n", data );
 
-	m_ack_out_func(0);
+	m_ack_handler(0);
 
 	if (m_index < MAX_PACKET_SIZE)
 		m_packet[m_index++] = data;
@@ -476,7 +456,7 @@ WRITE_LINE_MEMBER( upd1771c_device::pcm_write )
 
 TIMER_CALLBACK_MEMBER( upd1771c_device::ack_callback )
 {
-	m_ack_out_func(1);
+	m_ack_handler(1);
 }
 
 
diff --git a/src/mess/audio/upd1771.h b/src/mess/audio/upd1771.h
index f8c50a7996c..c3f0fa2b04c 100644
--- a/src/mess/audio/upd1771.h
+++ b/src/mess/audio/upd1771.h
@@ -7,18 +7,12 @@
 #ifndef __UPD1771_H__
 #define __UPD1771_H__
 
-#include "devcb.h"
+#include "emu.h"
 
 #define MAX_PACKET_SIZE 0x8000
 
-/***************************************************************************
-    TYPE DEFINITIONS
-***************************************************************************/
-
-struct upd1771_interface
-{
-	devcb_write_line    m_ack_callback;
-};
+#define MCFG_UPD1771_ACK_HANDLER(_devcb) \
+	devcb = &upd1771c_device::set_ack_handler(*device, DEVCB2_##_devcb);
 
 
 /***************************************************************************
@@ -26,20 +20,20 @@ struct upd1771_interface
 ***************************************************************************/
 
 class upd1771c_device : public device_t,
-						public device_sound_interface,
-						public upd1771_interface
+						public device_sound_interface
 {
 public:
 	upd1771c_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 	~upd1771c_device() {}
 
+	template<class _Object> static devcb2_base &set_ack_handler(device_t &device, _Object object) { return downcast<upd1771c_device &>(device).m_ack_handler.set_callback(object); }
+	
 	DECLARE_READ8_MEMBER( read );
 	DECLARE_WRITE8_MEMBER( write );
 	WRITE_LINE_MEMBER( pcm_write );
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
 	virtual void device_start();
 	virtual void device_reset();
 
@@ -49,7 +43,7 @@ protected:
 private:
 	// internal state
 	sound_stream *m_channel;
-	devcb_resolved_write_line m_ack_out_func;
+	devcb2_write_line m_ack_handler;
 	emu_timer *m_timer;
 
 	TIMER_CALLBACK_MEMBER(ack_callback);
diff --git a/src/mess/drivers/apc.c b/src/mess/drivers/apc.c
index d2455f9291b..9bbcbd5b20d 100644
--- a/src/mess/drivers/apc.c
+++ b/src/mess/drivers/apc.c
@@ -982,8 +982,6 @@ PALETTE_INIT_MEMBER(apc_state,apc)
 		palette.set_pen_color(i, pal1bit(0), pal1bit(0), pal1bit(0));
 }
 
-static const upd1771_interface upd1771c_config = { DEVCB_NULL };
-
 static MACHINE_CONFIG_START( apc, apc_state )
 
 	/* basic machine hardware */
@@ -1028,7 +1026,6 @@ static MACHINE_CONFIG_START( apc, apc_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_MONO("mono")
 	MCFG_SOUND_ADD( "upd1771c", UPD1771C, MAIN_CLOCK ) //uPD1771C-006
-	MCFG_SOUND_CONFIG( upd1771c_config )
 	MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 )
 MACHINE_CONFIG_END
 
diff --git a/src/mess/drivers/scv.c b/src/mess/drivers/scv.c
index 3b19a957cab..097f551f52e 100644
--- a/src/mess/drivers/scv.c
+++ b/src/mess/drivers/scv.c
@@ -815,9 +815,6 @@ static GFXDECODE_START( scv )
 GFXDECODE_END
 
 
-static const upd1771_interface scv_upd1771c_config = { DEVCB_DRIVER_LINE_MEMBER( scv_state, scv_upd1771_ack_w ) };
-
-
 static MACHINE_CONFIG_START( scv, scv_state )
 
 	MCFG_CPU_ADD( "maincpu", UPD7801, XTAL_4MHz )
@@ -837,7 +834,7 @@ static MACHINE_CONFIG_START( scv, scv_state )
 	/* Sound is generated by UPD1771C clocked at XTAL_6MHz */
 	MCFG_SPEAKER_STANDARD_MONO("mono")
 	MCFG_SOUND_ADD( "upd1771c", UPD1771C, XTAL_6MHz )
-	MCFG_SOUND_CONFIG( scv_upd1771c_config )
+	MCFG_UPD1771_ACK_HANDLER(WRITELINE(scv_state, scv_upd1771_ack_w))
 	MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 )
 
 	MCFG_CARTSLOT_ADD( "cart" )