upd

code/datums/autocells/explosion.dm

@@ -285,16 +285,16 @@ as having entered the turf.
 			if(mob_turf?.z == epicenter.z)
 				var/dist = get_dist(mob_turf, epicenter)
 				if(dist <= max(round(power, 1)))
-					our_mob.playsound_local(epicenter, null, 75, 1, frequency, falloff = 5, S = explosion_sound)
+					our_mob.playsound_local(epicenter, null, 75, 1, frequency, falloff = 5, sound_to_use = explosion_sound)
 					if(is_mainship_level(epicenter.z))
-						our_mob.playsound_local(epicenter, null, 40, 1, frequency, falloff = 5, S = creak_sound)//ship groaning under explosion effect
+						our_mob.playsound_local(epicenter, null, 40, 1, frequency, falloff = 5, sound_to_use = creak_sound)//ship groaning under explosion effect
 				// You hear a far explosion if you're outside the blast radius. Small bombs shouldn't be heard all over the station.
 				else if(dist <= far_dist)
 					var/far_volume = clamp(far_dist, 30, 60) // Volume is based on explosion size and dist
 					far_volume += (dist <= far_dist * 0.5 ? 50 : 0) // add 50 volume if the mob is pretty close to the explosion
-					our_mob.playsound_local(epicenter, null, far_volume, 1, frequency, falloff = 5, S = far_explosion_sound)
+					our_mob.playsound_local(epicenter, null, far_volume, 1, frequency, falloff = 5, sound_to_use = far_explosion_sound)
 					if(is_mainship_level(epicenter.z))
-						our_mob.playsound_local(epicenter, null, far_volume * 3, 1, frequency, falloff = 5, S = creak_sound)//ship groaning under explosion effect
+						our_mob.playsound_local(epicenter, null, far_volume * 3, 1, frequency, falloff = 5, sound_to_use = creak_sound)//ship groaning under explosion effect
 	if(!orig_range)
 		orig_range = round(power / falloff)
 	new /obj/effect/temp_visual/explosion(epicenter, orig_range, color, power)

code/modules/instruments/songs/play_legacy.dm

@@ -84,5 +84,5 @@
 		var/mob/M = i
 		if(M?.client?.prefs?.toggles_sound & SOUND_INSTRUMENTS_OFF)
 			continue
-		M.playsound_local(source, null, volume * using_instrument.volume_multiplier, S = music_played)
+		M.playsound_local(source, null, volume * using_instrument.volume_multiplier, sound_to_use = music_played)
 		// Could do environment and echo later but not for now

code/modules/mob/living/silicon/ai/freelook/eye.dm

@@ -199,7 +199,7 @@
 /mob/camera/aiEye/proc/unregister_facedir_signals(mob/user)
 	UnregisterSignal(user, list(COMSIG_KB_MOB_FACENORTH_DOWN, COMSIG_KB_MOB_FACEEAST_DOWN, COMSIG_KB_MOB_FACESOUTH_DOWN, COMSIG_KB_MOB_FACEWEST_DOWN))
 
-/mob/camera/aiEye/playsound_local(turf/turf_source, soundin, vol, vary, frequency, falloff, is_global, channel, sound/S, distance_multiplier, mob/sound_reciever)
+/mob/camera/aiEye/playsound_local(turf/turf_source, soundin, vol, vary, frequency, falloff, is_global, channel, sound/sound_to_use, distance_multiplier, mob/sound_reciever)
 	if(istype(parent_cameranet) && !parent_cameranet.checkTurfVis(get_turf(src)))
 		return
-	return ..(turf_source, soundin, vol, vary, frequency, falloff, is_global, channel, S, distance_multiplier, ai)
+	return ..(turf_source, soundin, vol, vary, frequency, falloff, is_global, channel, sound_to_use, distance_multiplier, ai)