Adds a generic projectile hit sound to most projectiles, except for practice laser and laser tag beams. Scales volume of projectile hit sounds by damage done by the specific projectile.

Overrides the generic sound with specific ones for electrodes and
lasers: sear.ogg for lasers and "sparks" for electrodes.

Thanks @optimumtact for your help with getting the hitsound volume scaling to work.

code/modules/projectiles/projectile.dm

@@ -18,6 +18,7 @@
 	anchored = 1 //There's a reason this is here, Mport. God fucking damn it -Agouri. Find&Fix by Pete. The reason this is here is to stop the curving of emitter shots.
 	pass_flags = PASSTABLE
 	mouse_opacity = 0
+	hitsound = 'sound/weapons/pierce.ogg'
 	var/bumped = 0		//Prevents it from hitting more than one guy at once
 	var/def_zone = ""	//Aiming at
 	var/mob/firer = null//Who shot it
@@ -59,8 +60,14 @@
 		var/mob/living/L = target
 		return L.apply_effects(stun, weaken, paralyze, irradiate, stutter, eyeblur, drowsy, blocked)
 
+	proc/vol_by_damage()
+		if(src.damage)
+			return Clamp((src.damage) * 2, 30, 100)// Multiply projectile damage by 2, then clamp the value between 30 and 100
+		else
+			return 40 //if the projectile doesn't do damage, play its hitsound at 40% volume
 
 	Bump(atom/A as mob|obj|turf|area)
+
 		if(A == firer)
 			loc = A.loc
 			return 0 //cannot shoot yourself
@@ -83,8 +90,11 @@
 			var/distance = get_dist(get_turf(A), starting) // Get the distance between the turf shot from and the mob we hit and use that for the calculations.
 			def_zone = ran_zone(def_zone, max(100-(7*distance), 5)) //Lower accurancy/longer range tradeoff. 7 is a balanced number to use.
 			if(silenced)
+				playsound(loc, hitsound, 5, 1, -1)
 				M << "<span class='userdanger'>You've been shot in the [parse_zone(def_zone)] by [src]!</span>"
 			else
+				var/volume = vol_by_damage()
+				playsound(loc, hitsound, volume, 1, -1)
 				M.visible_message("<span class='danger'>[M] is hit by [src] in the [parse_zone(def_zone)]!", \
 									"<span class='userdanger'>[M] is hit by [src] in the [parse_zone(def_zone)]!")	//X has fired Y is now given by the guns so you cant tell who shot you if you could not see the shooter
 			add_logs(firer, M, "shot", object="[src]", addition=reagent_note)

code/modules/projectiles/projectile/beams.dm

@@ -4,6 +4,7 @@
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 	damage = 20
 	damage_type = BURN
+	hitsound = 'sound/weapons/sear.ogg'
 	flag = "laser"
 	eyeblur = 2
 
@@ -12,6 +13,7 @@
 	icon_state = "laser"
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 	damage = 0
+	hitsound = null
 	damage_type = BURN
 	flag = "laser"
 	eyeblur = 2
@@ -58,6 +60,7 @@
 /obj/item/projectile/bluetag
 	name = "lasertag beam"
 	icon_state = "bluelaser"
+	hitsound = null
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 	damage = 0
 	damage_type = BURN
@@ -73,6 +76,7 @@
 /obj/item/projectile/redtag
 	name = "lasertag beam"
 	icon_state = "laser"
+	hitsound = null
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 	damage = 0
 	damage_type = BURN
@@ -87,6 +91,7 @@
 
 /obj/item/projectile/omnitag//A laser tag bolt that stuns EVERYONE
 	name = "lasertag beam"
+	hitsound = null
 	icon_state = "omnilaser"
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 	damage = 0

code/modules/projectiles/projectile/energy.dm

@@ -13,6 +13,7 @@
 	stun = 10
 	weaken = 10
 	stutter = 10
+	hitsound = "sparks"
 
 	on_hit(var/atom/target, var/blocked = 0)
 		if(!ismob(target) || blocked >= 2) //Fully blocked by mob or collided with dense object - burst into sparks!