add max charge sound for arc cannon

Northstar.Custom/mod/scripts/vscripts/weapons/_arc_cannon.nut

@@ -269,9 +269,11 @@ function FireArcCannon( entity weapon, WeaponPrimaryAttackParams attackParams )
 	weapon.EmitWeaponNpcSound( LOUD_WEAPON_AI_SOUND_RADIUS_MP, 0.2 )
 
 	weapon.PlayWeaponEffect( $"wpn_muzzleflash_arc_cannon_fp", $"wpn_muzzleflash_arc_cannon", "muzzle_flash" )
-	// Northstar missing: fix sound!!! default fire sound is too small in ttf2
+	// Northstar missing: fix sound!!!
 	weapon.EmitWeaponSound_1p3p( "weapon_electric_smoke_electrocute_titan_1p", "weapon_electric_smoke_electrocute_titan_3p")
 	weapon.EmitWeaponSound_1p3p( "weapon_batterygun_firestart_1p", "weapon_batterygun_fire_energydrained_3p")
+	if ( charge >= ARC_CANNON_DAMAGE_CHARGE_RATIO ) // firing with high charge frac, do a extra sound
+		weapon.EmitWeaponSound_1p3p( "MegaTurret_Laser_Fire_3P", "MegaTurret_Laser_Fire_3P")
 
 	local attachmentName = "muzzle_flash"
 	local attachmentIndex = weapon.LookupAttachment( attachmentName )