diff --git a/sc2/src/sc2code/comm.c b/sc2/src/sc2code/comm.c
index e43045452..7187ee963 100644
--- a/sc2/src/sc2code/comm.c
+++ b/sc2/src/sc2code/comm.c
@@ -1966,6 +1966,7 @@ HailAlien (void)
 	MEM_HANDLE hOldIndex;
 	ENCOUNTER_STATE ES;
 	FONT PlayerFont, OldFont;
+	MUSIC_REF SongRef = 0;
 
 	pCurInputState = &ES;
 	memset (pCurInputState, 0, sizeof (*pCurInputState));
@@ -1984,7 +1985,14 @@ HailAlien (void)
 	CommData.AlienColorMap = CaptureColorMap (
 			LoadColorMapInstance ((RESOURCE)CommData.AlienColorMap)
 			);
-	CommData.AlienSong = LoadMusicInstance ((RESOURCE)CommData.AlienSong);
+	if ((CommData.AlienSongFlags & LDASF_USE_ALTERNATE)
+			&& CommData.AlienAltSong)
+		SongRef = LoadMusicFile (CommData.AlienAltSong);
+	if (SongRef)
+		CommData.AlienSong = SongRef;
+	else
+		CommData.AlienSong = LoadMusicInstance ((RESOURCE)CommData.AlienSong);
+
 	CommData.ConversationPhrases = CaptureStringTable (
 			LoadStringTableInstance ((RESOURCE)CommData.ConversationPhrases)
 			);
diff --git a/sc2/src/sc2code/comm/arilou/arilouc.c b/sc2/src/sc2code/comm/arilou/arilouc.c
index 3a6be9070..567153ebe 100644
--- a/sc2/src/sc2code/comm/arilou/arilouc.c
+++ b/sc2/src/sc2code/comm/arilou/arilouc.c
@@ -35,6 +35,8 @@ static LOCDATA arilou_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	ARILOU_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	ARILOU_CONVERSATION_PHRASES, /* PlayerPhrases */
 	20, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/blackur/blackurc.c b/sc2/src/sc2code/comm/blackur/blackurc.c
index 0e6467849..25fbcd873 100644
--- a/sc2/src/sc2code/comm/blackur/blackurc.c
+++ b/sc2/src/sc2code/comm/blackur/blackurc.c
@@ -32,6 +32,8 @@ static LOCDATA blackurq_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	BLACKURQ_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	BLACKURQ_CONVERSATION_PHRASES, /* PlayerPhrases */
 	8, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/chmmr/chmmrc.c b/sc2/src/sc2code/comm/chmmr/chmmrc.c
index 91bab7d7c..ac83bb35e 100644
--- a/sc2/src/sc2code/comm/chmmr/chmmrc.c
+++ b/sc2/src/sc2code/comm/chmmr/chmmrc.c
@@ -35,6 +35,8 @@ static LOCDATA chmmr_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	(COLORMAP)CHMMR_COLOR_MAP, /* AlienColorMap */
 	CHMMR_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	CHMMR_CONVERSATION_PHRASES, /* PlayerPhrases */
 	6, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/comandr/comandr.c b/sc2/src/sc2code/comm/comandr/comandr.c
index 410a6f043..65abab205 100644
--- a/sc2/src/sc2code/comm/comandr/comandr.c
+++ b/sc2/src/sc2code/comm/comandr/comandr.c
@@ -34,6 +34,8 @@ static LOCDATA commander_desc =
 	0, /* SIS_TEXT_WIDTH, */ /* AlienTextWidth */
 	COMMANDER_COLOR_MAP, /* AlienColorMap */
 	COMMANDER_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	COMMANDER_CONVERSATION_PHRASES, /* PlayerPhrases */
 	3, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/druuge/druugec.c b/sc2/src/sc2code/comm/druuge/druugec.c
index 79b4bcffe..afafaeaaf 100644
--- a/sc2/src/sc2code/comm/druuge/druugec.c
+++ b/sc2/src/sc2code/comm/druuge/druugec.c
@@ -36,6 +36,8 @@ static LOCDATA druuge_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	DRUUGE_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	DRUUGE_CONVERSATION_PHRASES, /* PlayerPhrases */
 	11,
 	{
diff --git a/sc2/src/sc2code/comm/ilwrath/ilwrathc.c b/sc2/src/sc2code/comm/ilwrath/ilwrathc.c
index 0b00b3aad..acdb3bf83 100644
--- a/sc2/src/sc2code/comm/ilwrath/ilwrathc.c
+++ b/sc2/src/sc2code/comm/ilwrath/ilwrathc.c
@@ -35,6 +35,8 @@ static LOCDATA ilwrath_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	ILWRATH_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	ILWRATH_CONVERSATION_PHRASES, /* PlayerPhrases */
 	4, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/melnorm/melnorm.c b/sc2/src/sc2code/comm/melnorm/melnorm.c
index af9f393ce..fbe8e257b 100644
--- a/sc2/src/sc2code/comm/melnorm/melnorm.c
+++ b/sc2/src/sc2code/comm/melnorm/melnorm.c
@@ -51,6 +51,8 @@ static LOCDATA melnorme_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	MELNORME_COLOR_MAP, /* AlienColorMap */
 	MELNORME_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	MELNORME_CONVERSATION_PHRASES, /* PlayerPhrases */
 	4, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/mycon/myconc.c b/sc2/src/sc2code/comm/mycon/myconc.c
index 3f977197f..96314c8f5 100644
--- a/sc2/src/sc2code/comm/mycon/myconc.c
+++ b/sc2/src/sc2code/comm/mycon/myconc.c
@@ -36,6 +36,8 @@ static LOCDATA mycon_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	MYCON_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	MYCON_CONVERSATION_PHRASES, /* PlayerPhrases */
 	5, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/orz/orzc.c b/sc2/src/sc2code/comm/orz/orzc.c
index c72493329..65cc77c77 100644
--- a/sc2/src/sc2code/comm/orz/orzc.c
+++ b/sc2/src/sc2code/comm/orz/orzc.c
@@ -34,6 +34,8 @@ static LOCDATA orz_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	(COLORMAP)ORZ_COLOR_MAP, /* AlienColorMap */
 	ORZ_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	ORZ_CONVERSATION_PHRASES, /* PlayerPhrases */
 	12 /* 13 */, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/pkunk/pkunkc.c b/sc2/src/sc2code/comm/pkunk/pkunkc.c
index 05983859f..52210728d 100644
--- a/sc2/src/sc2code/comm/pkunk/pkunkc.c
+++ b/sc2/src/sc2code/comm/pkunk/pkunkc.c
@@ -36,6 +36,8 @@ static LOCDATA pkunk_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	PKUNK_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	PKUNK_CONVERSATION_PHRASES, /* PlayerPhrases */
 	3, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/rebel/rebel.c b/sc2/src/sc2code/comm/rebel/rebel.c
index 6f85129de..7b9700d4c 100644
--- a/sc2/src/sc2code/comm/rebel/rebel.c
+++ b/sc2/src/sc2code/comm/rebel/rebel.c
@@ -35,6 +35,8 @@ static LOCDATA yehat_desc =
 	0, /* (SIS_TEXT_WIDTH - 16) * 2 / 3, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	YEHAT_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	REBEL_CONVERSATION_PHRASES, /* PlayerPhrases */
 	15, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/shofixt/shofixt.c b/sc2/src/sc2code/comm/shofixt/shofixt.c
index 539d73604..a5d2873de 100644
--- a/sc2/src/sc2code/comm/shofixt/shofixt.c
+++ b/sc2/src/sc2code/comm/shofixt/shofixt.c
@@ -35,6 +35,8 @@ static LOCDATA shofixti_desc =
 	0, /* SIS_TEXT_WIDTH, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	SHOFIXTI_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SHOFIXTI_CONVERSATION_PHRASES, /* PlayerPhrases */
 	11, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/slyhome/slyhome.c b/sc2/src/sc2code/comm/slyhome/slyhome.c
index 25430eb89..b64750de3 100644
--- a/sc2/src/sc2code/comm/slyhome/slyhome.c
+++ b/sc2/src/sc2code/comm/slyhome/slyhome.c
@@ -34,6 +34,8 @@ static LOCDATA slylandro_desc =
 	0, /* SIS_TEXT_WIDTH, */ /* AlienTextWidth */
 	(COLORMAP)SLYLANDRO_COLOR_MAP, /* AlienColorMap */
 	SLYLANDRO_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SLYLANDRO_CONVERSATION_PHRASES, /* PlayerPhrases */
 	13, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/slyland/slyland.c b/sc2/src/sc2code/comm/slyland/slyland.c
index cab012ef1..703b87a56 100644
--- a/sc2/src/sc2code/comm/slyland/slyland.c
+++ b/sc2/src/sc2code/comm/slyland/slyland.c
@@ -36,6 +36,8 @@ static LOCDATA slylandro_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	SLYLAND_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SLYLAND_CONVERSATION_PHRASES, /* PlayerPhrases */
 	6, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/spahome/spahome.c b/sc2/src/sc2code/comm/spahome/spahome.c
index f267955fc..0c57bc94c 100644
--- a/sc2/src/sc2code/comm/spahome/spahome.c
+++ b/sc2/src/sc2code/comm/spahome/spahome.c
@@ -36,6 +36,8 @@ static LOCDATA spahome_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	(COLORMAP)SPATHI_HOME_COLOR_MAP, /* AlienColorMap */
 	SPATHI_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SPATHI_HOME_CONVERSATION_PHRASES, /* PlayerPhrases */
 	14, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/spathi/spathic.c b/sc2/src/sc2code/comm/spathi/spathic.c
index 13f5307aa..cea78ef87 100644
--- a/sc2/src/sc2code/comm/spathi/spathic.c
+++ b/sc2/src/sc2code/comm/spathi/spathic.c
@@ -35,6 +35,8 @@ static LOCDATA spathi_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	SPATHI_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SPATHI_CONVERSATION_PHRASES, /* PlayerPhrases */
 	8, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/starbas/starbas.c b/sc2/src/sc2code/comm/starbas/starbas.c
index 51d78a3a4..88778d762 100644
--- a/sc2/src/sc2code/comm/starbas/starbas.c
+++ b/sc2/src/sc2code/comm/starbas/starbas.c
@@ -52,6 +52,8 @@ static LOCDATA commander_desc =
 	0, /* SIS_TEXT_WIDTH, */ /* AlienTextWidth */
 	(COLORMAP)COMMANDER_COLOR_MAP, /* AlienColorMap */
 	COMMANDER_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	STARBASE_CONVERSATION_PHRASES, /* PlayerPhrases */
 	10, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/supox/supoxc.c b/sc2/src/sc2code/comm/supox/supoxc.c
index e79d9db49..66524fdd9 100644
--- a/sc2/src/sc2code/comm/supox/supoxc.c
+++ b/sc2/src/sc2code/comm/supox/supoxc.c
@@ -35,6 +35,8 @@ static LOCDATA supox_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	SUPOX_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SUPOX_CONVERSATION_PHRASES, /* PlayerPhrases */
 	4, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/syreen/syreenc.c b/sc2/src/sc2code/comm/syreen/syreenc.c
index 4a8ed2ee3..f7965ae05 100644
--- a/sc2/src/sc2code/comm/syreen/syreenc.c
+++ b/sc2/src/sc2code/comm/syreen/syreenc.c
@@ -35,6 +35,8 @@ static LOCDATA syreen_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	(COLORMAP)SYREEN_COLOR_MAP, /* AlienColorMap */
 	SYREEN_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	SYREEN_CONVERSATION_PHRASES, /* PlayerPhrases */
 	15, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/talkpet/talkpet.c b/sc2/src/sc2code/comm/talkpet/talkpet.c
index b3dce1da3..c4a6d8cb2 100644
--- a/sc2/src/sc2code/comm/talkpet/talkpet.c
+++ b/sc2/src/sc2code/comm/talkpet/talkpet.c
@@ -35,6 +35,8 @@ static LOCDATA talkpet_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	(COLORMAP)TALKING_PET_COLOR_MAP, /* AlienColorMap */
 	TALKING_PET_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	TALKING_PET_CONVERSATION_PHRASES, /* PlayerPhrases */
 	16, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/thradd/thraddc.c b/sc2/src/sc2code/comm/thradd/thraddc.c
index 425849a4f..e8cfee81a 100644
--- a/sc2/src/sc2code/comm/thradd/thraddc.c
+++ b/sc2/src/sc2code/comm/thradd/thraddc.c
@@ -36,6 +36,8 @@ static LOCDATA thradd_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	THRADD_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	THRADD_CONVERSATION_PHRASES, /* PlayerPhrases */
 	8, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/umgah/umgahc.c b/sc2/src/sc2code/comm/umgah/umgahc.c
index 62b22c04e..ebe0e21b0 100644
--- a/sc2/src/sc2code/comm/umgah/umgahc.c
+++ b/sc2/src/sc2code/comm/umgah/umgahc.c
@@ -35,6 +35,8 @@ static LOCDATA umgah_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	UMGAH_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	UMGAH_CONVERSATION_PHRASES, /* PlayerPhrases */
 	16, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/urquan/urquanc.c b/sc2/src/sc2code/comm/urquan/urquanc.c
index 04999a6d5..a5d119eee 100644
--- a/sc2/src/sc2code/comm/urquan/urquanc.c
+++ b/sc2/src/sc2code/comm/urquan/urquanc.c
@@ -32,6 +32,8 @@ static LOCDATA urquan_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	URQUAN_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	URQUAN_CONVERSATION_PHRASES, /* PlayerPhrases */
 	7, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/utwig/utwigc.c b/sc2/src/sc2code/comm/utwig/utwigc.c
index f16930bc2..a77c3a556 100644
--- a/sc2/src/sc2code/comm/utwig/utwigc.c
+++ b/sc2/src/sc2code/comm/utwig/utwigc.c
@@ -36,6 +36,8 @@ static LOCDATA utwig_desc =
 	0, /* SIS_TEXT_WIDTH - 16, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	UTWIG_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	UTWIG_CONVERSATION_PHRASES, /* PlayerPhrases */
 	16, /* NumAnimations */
 	{
@@ -962,6 +964,16 @@ init_utwig_comm (void)
 	utwig_desc.AlienTextTemplate.valign = VALIGN_MIDDLE;
 	utwig_desc.AlienTextWidth = SIS_TEXT_WIDTH - 16;
 
+	if (GET_GAME_STATE (UTWIG_HAVE_ULTRON))
+	{	// use alternate 'Happy Utwig!' track
+		utwig_desc.AlienAltSong = "comm/utwig/utwigult.ogg";
+		utwig_desc.AlienSongFlags |= LDASF_USE_ALTERNATE;
+	}
+	else
+	{	// regular track -- let's make sure
+		utwig_desc.AlienSongFlags &= ~LDASF_USE_ALTERNATE;
+	}
+
 	if (GET_GAME_STATE (UTWIG_HAVE_ULTRON)
 			|| LOBYTE (GLOBAL (CurrentActivity)) == WON_LAST_BATTLE)
 	{
diff --git a/sc2/src/sc2code/comm/vux/vuxc.c b/sc2/src/sc2code/comm/vux/vuxc.c
index a9d053795..849391e34 100644
--- a/sc2/src/sc2code/comm/vux/vuxc.c
+++ b/sc2/src/sc2code/comm/vux/vuxc.c
@@ -32,6 +32,8 @@ static LOCDATA vux_desc =
 	0, /* (SIS_TEXT_WIDTH - 16) >> 1, */ /* AlienTextWidth */
 	VUX_COLOR_MAP, /* AlienColorMap */
 	VUX_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	VUX_CONVERSATION_PHRASES, /* PlayerPhrases */
 	17, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/yehat/yehatc.c b/sc2/src/sc2code/comm/yehat/yehatc.c
index eaf9536be..e37ff61c1 100644
--- a/sc2/src/sc2code/comm/yehat/yehatc.c
+++ b/sc2/src/sc2code/comm/yehat/yehatc.c
@@ -37,6 +37,8 @@ static LOCDATA yehat_desc =
 	0, /* (SIS_TEXT_WIDTH - 16) * 2 / 3, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	YEHAT_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	YEHAT_CONVERSATION_PHRASES, /* PlayerPhrases */
 	15, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/comm/zoqfot/zoqfotc.c b/sc2/src/sc2code/comm/zoqfot/zoqfotc.c
index 97f0f7631..9f81198fd 100644
--- a/sc2/src/sc2code/comm/zoqfot/zoqfotc.c
+++ b/sc2/src/sc2code/comm/zoqfot/zoqfotc.c
@@ -52,6 +52,8 @@ static LOCDATA zoqfot_desc =
 	0, /* SIS_SCREEN_WIDTH, */ /* AlienTextWidth */
 	0, /* AlienColorMap */
 	ZOQFOTPIK_MUSIC, /* AlienSong */
+	0, /* AlienAltSong */
+	0, /* AlienSongFlags */
 	ZOQFOTPIK_CONVERSATION_PHRASES, /* PlayerPhrases */
 	3, /* NumAnimations */
 	{
diff --git a/sc2/src/sc2code/globdata.h b/sc2/src/sc2code/globdata.h
index 2c6938446..20a8ff1d1 100644
--- a/sc2/src/sc2code/globdata.h
+++ b/sc2/src/sc2code/globdata.h
@@ -111,6 +111,10 @@ typedef NUMBER_SPEECH_DESC *PNUMBER_SPEECH_DESC;
 #define NUMBER_SPEECH_DESCPTR PNUMBER_SPEECH_DESC
 typedef NUMBER_SPEECH_DESC *NUMBER_SPEECH;
 
+typedef DWORD LDAS_FLAGS;
+#define LDASF_NONE           ((LDAS_FLAGS)      0 )
+#define LDASF_USE_ALTERNATE  ((LDAS_FLAGS)(1 << 0))
+
 typedef struct
 {
 	void (*init_encounter_func) (void);
@@ -126,6 +130,8 @@ typedef struct
 	COUNT AlienTextWidth;
 	COLORMAP AlienColorMap;
 	DWORD AlienSong;
+	PVOID AlienAltSong;
+	LDAS_FLAGS AlienSongFlags;
 
 	STRING ConversationPhrases;