ImpactSound overhaul.

Nearly all cannons and missiles now have ImpactSounds. Rule of thumb: kaboom12 for cannons (tanks, gun turret), kaboom15 for artillery weapons (cruiser, missile sub, artillery), kaboom25 for missiles.
Exceptions are the Flak Truck and Light Tank, due to their high rate of fire.

mods/ra/weapons.yaml

@@ -140,6 +140,7 @@ Maverick:
 			Concrete: 50%
 		Explosion: med_explosion
 		WaterExplosion: med_splash
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -300,7 +301,7 @@ Dragon:
 		InfDeath: 4
 		SmudgeType: Crater
 		Damage: 50
-		ImpactSound: kaboom12.aud
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 
 HellfireAG:
@@ -333,6 +334,7 @@ HellfireAG:
 		InfDeath: 4
 		SmudgeType: Crater
 		Damage: 40
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 
 HellfireAA:
@@ -388,7 +390,7 @@ Grenade:
 		InfDeath: 3
 		SmudgeType: Crater
 		Damage: 60
-		ImpactSound: kaboom12.aud
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 
 25mm:
@@ -427,6 +429,7 @@ Grenade:
 			Concrete: 50%
 		Explosion: small_explosion
 		WaterExplosion: small_splash
+		ImpactSound: kaboom12.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -450,6 +453,7 @@ Grenade:
 			Concrete: 50%
 		Explosion: small_explosion
 		WaterExplosion: small_splash
+		ImpactSound: kaboom12.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -472,6 +476,7 @@ Grenade:
 			Concrete: 50%
 		Explosion: small_explosion
 		WaterExplosion: small_splash
+		ImpactSound: kaboom12.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -493,6 +498,7 @@ TurretGun:
 			Concrete: 50%
 		Explosion: small_explosion
 		WaterExplosion: small_splash
+		ImpactSound: kaboom12.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -524,6 +530,7 @@ MammothTusk:
 			Heavy: 25%
 		Explosion: med_explosion_air
 		WaterExplosion: med_splash
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 3
 		SmudgeType: Crater
@@ -551,6 +558,7 @@ MammothTusk:
 			Concrete: 50%
 		Explosion: artillery_explosion
 		WaterExplosion: med_splash
+		ImpactSound: kaboom15.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 3
 		SmudgeType: Crater
@@ -692,6 +700,7 @@ Nike:
 			Heavy: 50%
 			Concrete: 0%
 		Explosion: med_explosion_air
+		ImpactSound: kaboom25.aud
 		InfDeath: 3
 		SmudgeType: Crater
 		Damage: 100
@@ -719,6 +728,7 @@ RedEye:
 			Light: 60%
 			Heavy: 25%
 		Explosion: med_explosion_air
+		ImpactSound: kaboom25.aud
 		InfDeath: 3
 		SmudgeType: Crater
 		Damage: 40
@@ -747,7 +757,7 @@ RedEye:
 		InfDeath: 3
 		SmudgeType: Crater
 		Damage: 250
-		ImpactSound: kaboom12.aud
+		ImpactSound: kaboom15.aud
 		WaterImpactSound: splash9.aud
 
 SubMissile:
@@ -774,7 +784,7 @@ SubMissile:
 		InfDeath: 3
 		SmudgeType: Crater
 		Damage: 300
-		ImpactSound: kaboom12.aud
+		ImpactSound: kaboom15.aud
 		WaterImpactSound: splash9.aud
 
 Stinger:
@@ -804,6 +814,7 @@ Stinger:
 			Concrete: 50%
 		Explosion: med_explosion
 		WaterExplosion: med_splash
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -853,6 +864,7 @@ TorpTube:
 			Concrete: 50%
 		Explosion: small_explosion
 		WaterExplosion: med_splash
+		ImpactSound: kaboom12.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater
@@ -1277,6 +1289,7 @@ ChronoTusk:
 			Concrete: 50%
 		Explosion: med_explosion
 		WaterExplosion: med_splash
+		ImpactSound: kaboom25.aud
 		WaterImpactSound: splash9.aud
 		InfDeath: 4
 		SmudgeType: Crater