List of HL2 Soundscapes

Here is a list of 245 soundscapes for use in Half-Life 2. An easy way of testing them is to use the playsoundscape console command, which includes limited searching for soundscape names so you shouldn't have to print out a copy of this list for reference.

Soundscapes with 'util' in the name are intended for inclusion in other, full soundscapes. While they should work without problems in-game, they generally aren't nearly as varied or deep as the resulting composites. Others have positional sounds which will be played at certain locations specified in the env_soundscape entity's properties. If these locations are not given, the sounds will not be heard.

Generic and Test

Name	Description	Position Number	Position Description
Nothing	No DSP, no ambients.
Automatic	DSP 1, dsp_volume 1.0.
automatic_dialog	Automatic DSP at 50% mix.
e3_techdemo_gmanspeaking	DSP 10.
e3_Techdemo_02	Physics room.
e3_Techdemo_03	DSP 1.
e3_Techdemo_05	Dripping cave ambient.
e3_Techdemo_06	Lake.
e3_end	Identical to Nothing.
GenericIndoor	Fluorescent lighting hum.
GenericOutdoor	Electric hum like above with a motor / gas / wind kind of sound in the background.	0	Quiet electric hum.
Cabin	Medium-low sound of fire burning or rumbling; soft clicking; a slightly louder four-tick rhythm followed by a release or exhaust sound (ahuugha).	0	Faint banjo-like TV music.
		1	Regular melodious whirring sound, like a small engine trying to start or a sump pump kicking in.
cabin_outdoor	Faint ambient white noise or rumble with occasional bird twittering. In the background, a faint but noticeable medium low sound that regularly builds up and then drops off before beginning again: wwwwwwwwwwwww - enuu.
test_tvset	Music coming from a TV set	0	Banjo-like TV music.

Train Station and City 17

Name	Description	Position Number	Position Description
d1_trainstation.util_city	Distant sounds of trains, cars, helicopters and other aircraft. APC and city alarm sounds.
d1_trainstation.city	All of the above plus a busy train station background ambience.
d1_trainstation.Platform	Loud and static hissing sound, city sounds barely audible in the background.
d1_trainstation.Turnstyle	Identical to d1_trainstation.city but city sounds less audible.
combine.computer	Loud, flat whine and an occasional blip.
d1_trainstation.Interrogation	Mixed uproar of the surrounding city and a combine terminal.	0	Combine computer terminal.
d1_trainstation.TerminalSquare	Similar to d1_trainstation.Turnstyle but with more city sounds like driving / beeping cars and background talking / train station messages.
d1_trainstation.QuietCourtyard	Quiet, windy courtyard with distant trains, cars, helicopters etc.
d1_trainstation.Occupants	Footsteps, clinging dishes, coughs, creaking floors and doors, distant rumbles, no background noise.
d1_trainstation.AppartmentCourtyard	Above mixed to city sounds.
d1_trainstation.Appartments	Similar to d1_trainstation.Occupants with background crowd noises.
d1_trainstation.RaidCityvoice	Cityvoice: (1) Citizen notice, priority identification check in progress. Please, assemble in your designated inspection position. (2) Attention please, all citizens in local residential block assume your inspection position. (3) Attention residents, this block contains potential civil infection. Inform, cooperate, assemble. (4) Citizen notice, failure to cooperate will result in permanent offworld relocation.
d1_trainstation.RaidOccupants	Breaking glass and boxes, footsteps on stairs and glass, breaking plates, woman screams and man grunts like being hit.
d1_trainstation.RaidAppartments	A combination of the two above with background crowd noises.
general.concrete_quiet	Semi-loud hum of moving air.

PA announcements for City 17

Name	Description	Position Number	Position Description
cityvoice_level0	PA requests player id, cityvoice: (1) Attention please, unidentified person of interest, confirm your civil status with local protection team immediately. (2) Attention protection team, status ivation in progress in this community. Respond, isolate, inquire.
cityvoice_level1	PA invokes unrest procedures, requests player id, cityvoice: (1) Citizen reminder, inaction is conspiracy, report counter behavior to a civil protection team immediately. (2) Attention community, unrest procedure code is now in effect, inoculate, shield, pacify. Code: pressure, sword, sterilize, (3) Attention please, unidentified person of interest, confirm your civil status with local protection team immediately. (4) Attention protection team, status ivation in progress in this community. Respond, isolate, inquire.
cityvoice_level2	Player is evading, cops are summoned, cityvoice: (1) Attention please, evasion behavior consistent with now compliant defendant. Ground protection team, alert! Code: isolate, expose, administer. (2) Attention community, unrest procedure code is now in effect, inoculate, shield, pacify. Code: pressure, sword, sterilize. (3) Protection team alert! Evidence of anti-civil activity in this community. Code: assemble, clamp, contain. (4) Citizen reminder, inaction is conspiracy, report counter behavior to a civil protection team immediately.
cityvoice_level3	Player convicted of civil disruption, city block on alert, cityvoice: (1) Individual, you are charged with socio endangerment level 1. Protection unit, prosecution code: beauty, sword, midnight. (2) Alert, community ground protection units, local unrest structure detected. Assemble, administer, pacify. (3) Attention community, unrest procedure code is now in effect, inoculate, shield, pacify. Code: pressure, sword, sterilize. (4) Protection team alert! Evidence of anti-civil activity in this community. Code: assemble, clamp, contain.
cityvoice_level4	Player convicted of anti-civil activity, city block punished, cityvoice: (1)(2) Individual, you are now charged with socio endangerment level 5, cease evasion immediately. Receive your ???. (3) You are charged with anti-civil activity level 1. Protection unit, prosecution code: beauty, sword, operate. (4) Attention occupants, your block is now charged with permissive inactive coesion, 5 ration units deducted. (5) Attention community, unrest procedure code is now in effect, inoculate, shield, pacify. Code: pressure, sword, sterilize. (6) Attention all-ground protection teams, ??? judgement is now in effect, sentencing is now discretionary. Code: amputate, zero, confirm.
cityvoice_level5	Citizenship revoked, cops fire at will, cityvoice: (1)(2) Individual, you are convicted of mostly anti-civil violation. Implicit citizenship revoked. Status malignant. (3) Individual, you are charged with capital malcompliance, anti-citizen status approved. (4) Attention ground units, anti-citizen reported in this community, code: block, cauterize, stabilize. (5) Attention occupants, your block is now charged with permissive inactive coesion, 5 ration units deducted. (6) Attention all ground protection teams, judgement waiver now in effect, capital prosecution is discretionary.
city_searching_level1	City background noise with helicopters and other aircraft, apc alarms and distant train horns.
city_searching_level2	Same as above but with more frequent helicopters and distant trucks passing.
city_searching_level3	A combination of the two above but with even more frequent trucks passing.

Canals

Name	Description	Position Number	Position Description
d1_canals.util_windgusts	Wind gusts and snippets.
d1_canals.util_drips	Water dripping.
d1_canals.util_fardrips	Water dripping a bit further away, with interior echo.
d1_canals.util_headcrab_canister	Strong hissing noise and randomly combine machinery beeping.
d1_canals.util_shoreline	Small waves hitting shore.
d1_canals_tunnel01	Constant sound of a trains overhead, plays city_searching_level1 and cityvoice_level0 PA announcements.	0	Loop of a train driving by overhead.
d1_canals_citystart	Train horning close by, plays city_searching_level1 and cityvoice_level0 PA announcements.
d1_canals_citadel	Atmospheric corridor wind sounds, plays city_searching_level1 and cityvoice_level0 PA announcements.
d1_canals_traincanal	Plays city_searching_level1 and cityvoice_level0 PA announcements.
d1_canals_traintunnel	Strong, low tunnelish rumble in the background, plays city_searching_level1 and cityvoice_level0 PA announcements.
d1_canals_watercanal	Constant sounds of waving water and water hitting a boat, plays city_searching_level1 and cityvoice_level1 PA announcements.	1	Water hitting boat.
d1_canals_junkyard	Randomly metal stress / creaking, plays city_searching_level2 and cityvoice_level1 PA announcements.
d1_canals_copcanals	Trucks randomly passing by overhead, dripping water, plays city_searching_level1 and cityvoice_level2 PA announcements.	2	Dripping water.
		3	Wind blowing in a corridor, dripping water and other echoing sewer like effects.
d1_truck_pass	Quick, low noise of trucks and other vehicles passing by overhead. For use with other soundscapes.
d1_canals_barnacle_tunnel	Wind gusts in a tunnel, trucks passing by overhead, plays city_searching_level1 and cityvoice_level3 PA announcements.
d1_canals_pipe_chamber	Dripping water, wind tunnel gusts, trucks passing by overhead, plays city_searching_level2.
d1_canals_cop_alerted	Trucks randomly passing by overhead, dripping water, wind gusts in a tunnel, plays city_searching_level3 and cityvoice_level4 PA announcements.	2	Dripping water.
d1_canals.heli_slide_tunnels	Interior. running sewer water, water dripping, trucks passing by overhead, quetly plays city_searching_level3 and cityvoice_level4 PA announcements.
d1_canals.heli_attack	Exterior. quiet running sewer water, trucks passing by, plays city_searching_level3 and cityvoice_level4 PA announcements.
d1_canals.drainroom	Tunnel wind, loud running water, quietly plays city_searching_level2 and cityvoice_level4 PA announcements.	0	Running river water loop.
		1	Running river water loop.
		2	Ambient corridor wind.
d1_canals.03copsattackthroughboards	Exterior, quiet idle diesel engine, trucks passing by, plays city_searching_level2 and cityvoice_level5 PA announcements.	0	Quiet loop of a running diesel engine.
d1_canals.03entrytunnel	Interior, running water, far water dripping, tunnel wind, plays city_searching_level2 and cityvoice_level5 PA announcements.	0	Ambient corridor wind.
		2	Constant flow water leaking.
d1_canals.steamtunnel	Interior, soft ambient industrial humming, plays cityvoice_level5 PA announcements.
d1_canals.waterpuzzleroom	Manhack and water puzzle room, loud industrial hum and dripping water.
d1_canals.util_birds	Infrequent bird squawks.
d1_canals.util_critters	Infrequent croaking noises.
d1_canals.util_tunnel_windgusts	Occasional infrequent wind blowing through tunnel, varying pitches.
d1_canals.util_critters_under_docks	Constant sound of frogs with critters and sometimes shoreline waves.
d1_canals.util_toxic_slime	Slime gurgling and hissing.
d1_canals.util_industrial	Brief industrial ambience, elevated pitch, as of air passing through a small enclosed space such as a vent.
d1_canals.general_dripping_tunnel	Numerous constant dripping sources and regular wind gusts of varying pitches.
d1_canals.general_windy_tunnel	Loud, centred, continuous fairly low-pitched wind gust and occasional additional ones at different pans.
d1_canals.general_watery_tunnel	Interior. Sound of continuously running rivulets of water in a tunnel, additional frequent dripping and occasional sound of critters from varying directions.	0	Water dripping.
		1	Different kind of critters.
d1_canals.general_watery_tunnel_shore	Similar to above but with the sound of waves regularly breaking in a small rocky lagoon.
d1_canals.redbarn_ambience	Interior. Quiet calm river sounds with distant critters, birds, occationally wind gusts and wood creaks. Also a headcrab canister nearby.	0	Headcrab canister.
d1_canals.floodgate_base_ambience	Interior. Continues beeping from the manhack charging station with looping generator sounds and a quiet windy enclosed cargo ambience.	0	Beeping of a Manhack charging station.
		1	Combine computer terminal.
d1_canals.floodgate_machineroom	Looped machines droning as of a pump or motor.
d1_canals.shore_and_reeds	Waves calmy crashing shore with occasional frog croaks/critter chirps / bird song and wind snippets.
d1_canals.spooky_infested_pipe	Interior. Dripping water with somewhat frequent eerie, modulating wind noise and rare critter chirps.
d1_canals.water_tunnel_with_frogs	Pipe constantly draining into water with breaking waves and voluminous frog song plus occationally other distant critter noise.
d1_canals.windchimes_and_wind	Constant wind whistling mixed with intermittent wind chime song and distant birds.	0	Windchimes.
canals_slime_outside	Constant slime gurgling with a tunnel wind ambience.	0	Burbling toxic slime.
canals_slime_tunnel	Same as above but with a clearer wind ambience and frequently wind gusts.	0	Burbling toxic slime.
canals_tunnel_dry	Tunnel dry of water with ambient wind gusts and as if cars are driving by overhead.
canals_tunnel_wet	Similar to d1_canals.general_watery_tunnel but with atmospheric tunnel wind.
canals_canal_nowater	Relatively quiet with infrequent distant sound of birds and wind snippets.
canals_canal_water	Constant sound of shoreline waves with birds and wind gusts.
canals_canal_water_industrial	Similar to above but with machine rumbling instead of the sound of birds.
canals_river	Identical to canals_canal_water but with a sense of stronger wind with it being an open area.
canals_river_calm	Similar to above but with constant quiet sounds of frogs and other critters.
d1_canals_05_shanty_approach	Continuous glutinous gurgling toxic slime and wind gusts from time to time.	0	Burbling toxic slime.
		1	Burbling toxic slime.
d1_canals_05_shanty	Somewhat quiet infrequent wind with toxic slime and lots of headcrab canister steam / beeping.	0	Burbling toxic slime.
		1	Burbling toxic slime.
		2	Headcrab canister.
		3	Headcrab canister.
		4	Headcrab canister.
		5	Headcrab canister.
		6	Headcrab canister.
d1_canals_07_entry_tunnel	Ambient tunnel sounds with water drips and wind gusts.	0	Far water drips.
		1	Water drips.
d1_canals_07a_warehouse	Ambient atmospheric base wind with occationally wind gusts and wood creaking.
d1_canals_08a_gun_tunnel_entrance	Continuous running water plus sound of waves breaking.
d1_canals_08a_puzzle_arena	The outdoor area where the ramp puzzle is. Waves breaking, infrequent chirping and wind noises, enclosed outdoor space.
d1_canals_08a_gun_scene	The gun scene tunnel area where the player gets the airboat helicopter gun. Tunnel wind with water dripping and the extremely quiet sound of running water.	0	Far water drips.
		1	Water drips.
d1_canals_08a_tunnel_exit	The gun scene exit tunnel. Stonger tunnel wind than above (with it being an exit) and occationally wind gusts.
canals_canal_water_creaking_wood	Water constantly breaking shore, wind gusts, the sound of birds and often wood creaking.	0	Wood creaking.
		1	Wood creaking.
canals_canal_water_creaking_metal	Similar to above but with stressing metal instead of wood creaking.	0	Metal stress.
		1	Metal stress.
d1_canals_08_entry_tunnel	Interior. Tunnel wind, wind gusts, water dripping and an helicopter passing every 15-25 seconds.	0	Far dripping water.
		2	Passing helicopter.
d1_canals_08_reservoir	The reservoir where the battle with the helicopter happens. Quiet water breaking, birds, wind snippets, constant background frog sounds and other critters. Loud positional dam water loop.	1	Loud pouring dam water.
d1_canals_08_island	This is the island that the combine reservoir base is on. Identical to above but more wind gusts with it being on higher ground.	0	Loud pouring dam water.
d1_canals_08_base_interior	Base wind ambience and a combine computer terminal nearby.	1	Combine computer terminal.

Kleiner's Lab and Black Mesa East

Name	Description	Position Number	Position Description
K_lab.LabSounds	Room atmosphere with very frequent slime gurgling and machines.	0	Slime gurgling loop.
		1	Computer beeping and other machine noises.
E3_lab.LabSounds	Fluorescent lights in a laboratory with machines and music playing.	0	Various strange machine noises (goo tubes).
		1	Running lab machines.
eli_01_lab_main_1	Quiet room with the sound of elevators, slime gurgling, and beeping machines.	0	Very silent water sounds and slime gurgling noises.
		1	Beeping lab equipment.
		2	The sound of moving elevators from an elevator shaft.
		3	Vort lab machine hum.
eli_01_elevator_1	Eleveator shaft. Low volume medium pitch machinery sound accompanied by a regularly recurring, almost bell-like hum: hwuuung - hwuuung - hwunng.
eli_01_upperhall_2	Musical throbbing note, medium low, that reverberates three times (bwuung-weh-weh-weh), mixed with very quiet random metal rattles, dripping water and coughing.	0	Randomly metal rattling, rain dripping and people coughing.
eli_01_upperhall_1	Low atmospheric rumble/wavering sound with the ahhhh-ho clik! of some slow pump or piston device in the background.
eli_01_lowerlab_hall_1	Slightly louder and more resonant version of eli_01_upperhall_2 with an engine room nearby.	0	Quiet engine sounds and random metal rattling, rain dripping and people coughing.
eli_01_lower_corridor_1	Generic underground corridor ambience.
eli_01_lower_ravenhall_1	Unsetttling windy medium sized tunnel with cave rubbling.
eli_01_lower_ravenhall_2	Many far away explosions and cave rubbles.
eli_02_lowerlab_hall_1	Very similar to eli_01_lowerlab_hall_1 but with not so far-away explosions.	0	Quiet running engine.
eli_02_lower_corridor_1	Generic underground corridor ambience with regular occouring metal rattling and explosions.
eli_02_ravenshaft_1	Almost identical to eli_01_lower_ravenhall_1 but the cave hits having a higher volume range starting point of 0.02.
eli_02_ravenshaft_2	Wood creaking, wind blowing and frequent drips of water.	0	Quiet wood creaking, strange cave noises and rock rumbles.
eli_02_scrapyard_1	Enclosed outside area ambience with no life.
eli_02_scrapyard_2	Same as above but with a little more wind.

Ravenholm

Name	Description	Position Number	Position Description
d1_town.ScaredPeopleInside	Utility soundscape. Scared crying and breating, plays every 60-300 seconds.
d1_town.ScaredPeopleOutside	Utility soundscape. Woman screaming, muffled and scared cries, plays every 60-300 seconds.
d1_town.Start	Night. A lot of alley wind with directional wind gusts and snippets, zombies howling in the distance and screaming / scared people.
d1_town.Street	Wind, metallic scrapes and bangs, distant and close-range zombie sounds. Feels much 'closer' than the previous.
d1_town.CorpseRoom	Room with corpses, really quiet atmosphere with up-close regular buzzing flies, sound of rats, and sometimes scared and screaming people outside.
d1_town.WoodBuilding	Quiet enclosed atmosphere, wood creaking, rats and buzzing flies and breathing of scared people from inside the building.
d1_town.ConcreteBuilding	Identical to Automatic.
d1_town.Rooftop	Constant low rumble; gusts and whistles of wind with it being high up. Irregular mixture of medium to low volume metallic creaks and groans, high and low scraping sounds, and chain link fence scraping and impacts.
d1_town.MineshaftDown	Wind blowing, wood creaking, rock rumbling sounds and cave ambience.
d1_town.WaterCave	Wind gusts, cave ambience and the dripping of water.
d1_town.HeadcrabCave	A combination of the two above but with metal stress instead of creaking wood.
d1_town.CaveTunnel	Corridor ambience with rock rumbling sounds.

Coastline and Highway 17

Name	Description	Position Number	Position Description
coast.util_headcrab_canister	Silence with occasional bizarre Combine tech noise.
coast.util_metalstress	Silence with occasional sounds of metal stress.
coast.util_shackmetal	Silence with occasional quick squeeks from moving metal.
coast.util_crumblycliff	Silence with sounds of crumbling landmasses.
coast.util_windgusts	Silence with wind gusts.
coast.util_fardrips	Silence with water dripping.
coast.util_birds	Silence with occasional sounds of seagulls calling.
coast.util_lakeshoreline	Waves breaking gently.
coast.util_shoreline	Similar to above, but with what feels like much more massive waves.
coast.util_distant_shoreline	Similar to above, but from a greater distace.
coast.util_antlion_den	Antlions hissing.
coast.general_windy_tunnel	Steady whine of wind in a tunnel and muffled sounds of waves crashing.
coast.general_tunnel	Similar to above but quieter and with waterdrips mixed in.
coast.zombie_tunnel	Steady, tunnelish sound and some occasional train sounds.
coast.general_oldwoodbuilding	Wood stress, wind gusting, seagulls calling.
coast.general_oldwoodbuilding_with_windchimes	Same as above but with chimes.	0	Windchimes.
coast.combine_controlroom_ambience	Steady whine of Combine tech.
coast.general_shoreline	Waves crashing, wind gusting, seagulls calling.
coast.positional_shoreline	Similar to above, but closer by.	0	Water waves crashing.
		1	Water waves crashing.
		2	Water waves crashing.
		3	Water waves crashing.
		4	Water waves crashing.
coast.shoreline_with_antlion_dens	Similar to "coast.general_shoreline", but with antlion sounds.	0	Antlion den sounds.
		1	Antlion den sounds.
		2	Antlion den sounds.
		3	Antlion den sounds.
coast.bridge_ambient	Wind blowing, seagulls calling.
coast.bridge_shack	Same as above but quieter.
coast.cliffside	A mix of "coast.general_shoreline" and "coast.util_crumblycliff".
coast.bridge_concrete_room	Muffled, distant wave sounds. Ideal for coastal buildings which aren't completely open to the elements.
coast.generic_ambient_01	Similar to above, but without the antlions.
coast.distant_shoreline	Distant waves breaking, wind gusting and close-range antlion sounds.	0	Antlion den sounds.
		1	Antlion den sounds.
		2	Antlion den sounds.

Nova Prospekt

Name	Description	Position Number	Position Description
prison.util_distantcombat_verylight	Quiet ambience,occasionally the sound of a soldier dying, or gunfire.
prison.util_distantcombat_light	Identical to the soundscape above, just with more gunfire, and antlion hiss'.
prison.util_distantcombat_heavy	Clear sound of Combine Soldiers fighting Antlions - lots of gunfire and explosions.
prison.util_antlion_burrows	Sound of Antlions hissing and growling, waiting to ambush the enemy.
prison.util_fardrips	Far away drips.
prison.util_drips	Same drips but closer.
prison.util_distant_trains	Far away train horns.
prison.util_radio	Random radio sounds.
prison.util_control_room	Rubbles and machine sounds from a combine monitor.	0	Combine computer terminal.
prison.citizen_camp	Outdoor gusts, low booming, and whistling of wind, dying away to silence before repeating after a few seconds.
prison.redlight_bunker	Constant wind.
prison.outdoor_courtyard	Wind with far away thumper sounds.
prison.outdoor_courtyard_hvycombat	Same as above but with gun fire, soliders and antlions dying/attacking.
prison.trainstation	Room ambience with occasional train horns.
prison.teleport_area	Combine machine sounds in a big open room.	0	Combine computer terminal.
		1	Combine computer terminal.
prison.control_room	Combine beeping sounds with a fan in the background.	0	Various radio noises.
		1	Combine computer terminal.
prison.control_room_simple	Computer/combine console hum with centered combine soldier vocoder noise (as heard in nova propekt scripted radio transmissions), but no speech.	0	Various radio noises.
prison.combine_wall	Loud ambience of the outside with explosion-like sounds.
prison.util_quiet_cellblock	Relatively loud ambience, with fluorescent lighting hum, metal flutterings and scrapings. Utility, but works quite well on its own.
prison.util_louder_cellblock	Slightly quieter ambience.
prison.larger_cellblock_vlightcombat	Machine sounds and metal rumbling in a corridor.
prison.larger_cellblock_hvycombat	Same as above but with soliders, gunfire and antlions.
prison.larger_cellblock_lightcombat	Same as above but only with gunfire.
prison.general_hallway_lightcombat	Hallway with antlions, grenades and soliders.
prison.general_hallway_vlightcombat	Same as above but with no fights.
prison.general_dripping_tunnel	A tunnel with water drips.
prison.hall_with_burrows	Hallway with crickets and antlion burrowing sounds.	0	Various antlion sounds.
		1	Various antlion sounds.
prison.electric_water_room	Water flowing in a room with machines in it.
prison.laundry	Loud, whooshing metallic machinery sounds.	0	Ambient laundry machines hum.
prison.watery_hallway	A lot of drips.
prison.showers	Loud, fairly high-pitched water pipes and water dripping.	0	Running water.
		1	Water dripping.
		2	Steam loop.
prison.zombie_infested	Flies, distant drips, rats and deep, wind-like sounds.

War-torn City 17

Name	Description	Position Number	Position Description
streetwar.util_combine_atmosphere	Constant random wind gusts and machine-like sounds.
streetwar.util_rubble	Random rubble falling off of somewhere.
streetwar.util_sirens	Manhacks, cityscanners and APCs passing by.
streetwar.util_light_sirens	Same as above but less frequent.
streetwar.util_zombie_infested	Occasional buzzing flies and faint chirping birds.
streetwar.util_light_combat_atmosphere	Random wind blows and metal ambiences, helicopters passing by.
streetwar.util_heavy_combat_atmosphere	Same as above but more frequent.
streetwar.util_muffled_light_combat	Thunder sounds and distant explosions.
streetwar.util_light_combat	Rare gun fire, zombies, antlions and soliders.
streetwar.util_medium_combat	Same as above but slightly more frequent.
streetwar.util_heavy_combat	Same as above but more frequent.
streetwar.util_drips	Water drips close up.
streetwar.util_fardrips	Same as above but farther away.
streetwar.zombie_water_room	Occasional buzzing flies and fairly loud dripping water.
streetwar.car_tunnel	Tunnel with cars passing by and silent explosions happening rarely.
streetwar.general_small_tunnel	Ambience of a small tunnel.
streetwar.car_tunnel_opensky	Same as "streetwar.car_tunnel" but with outdoor sounds and fighting sounds.
streetwar.toxic_car_tunnel	Same as "streetwar.car_tunnel" but with toxic slime gurgling.
streetwar.infested_appartments	Flies, fighting sounds, metal creaking and rats in a house.
streetwar.general_indoor_light_combat	Rare fighting from indoors.
streetwar.general_indoor_medium_combat	Same as above, but slightly more frequent.
streetwar.general_indoor_heavy_combat	Same as above, but more frequent.
streetwar.general_outdoor_light_combat	Fighting sounds from outdoors with alarms.
streetwar.general_outdoor_medium_combat	Same as above, but slightly more frequent.
streetwar.general_outdoor_heavy_combat	Same as above, but more frequent.
streetwar.destroyed_concrete_building	Fighting sounds, explosions, wind in a building with outdoor sounds in the background.
streetwar.rooftop_heavy_combat	Many fighting sounds with an alarm in the background and wind on top of a roof.
streetwar.control_room	Combine machines beeping.	0	Combine computer terminal.
		1	Combine computer terminal.
streetwar.bank_control_room	Same as above but with no beeping but instead just random machine sounds.	0	Combine computer terminal.
streetwar.bank_machine_room	Steam, machine sounds, silent wind in a room full of pipes.
streetwar.bank_general	A big room with silent wind and with silent fighting in the background.
e3_c17_01_battle	Fire, silent alarm in the background, fighting sounds.	0	Medium sized fire loop.
		1	Combine barricade gate noises.
		2	Ambient city siren loop.
c17_02_street_lower_1	Wind, very silent alarm, fighting sounds.	0	Combine wall thundering.
c17_02_street_upper_1	Same as above but with explosions and louder fighting.
c17_02_street_upper_2	Same as above but with a louder alarm.	0	Combine wall thundering.
c17_02_inside_apartments_1	Random loud metal creaking in a room with fluorescent light.	0	Combine wall thundering and machine noises.
streetwar.underground_manhack_tunnel	Loud steam, water dripping, silent machines and high pitched 'stingers'.
streetwar.vertical_warehouse_arena	Wind passing by.

Combine Citadel

Name	Description	Position Number	Position Description
d3_citadel.silence_and_dialog	Seems to mute all sounds (except dialogue, presumably). Could be useful for cutscenes when music is playing?
d3_citadel.util_hits	Strange, machine-like sounds.
d3_citadel.util_activity	Strider or gunship sounds.
d3_citadel.util_pods	Strange machine passing by.
d3_citadel.deep_dropoff_inside	Loud ambience with strange machine sounds and enemy sounds.
d3_citadel.pod_vista	Very loud pods moving.
d3_citadel.generic	Kind of silent Citadel ambience with no combat.
d3_citadel.generic_moody	Fairly loud, near-musical Citadel ambience; no combat sounds.
d3_citadel.generic_moody2	Quieter Citadel ambience; no combat sounds.
d3_citadel.stasis_room	Loud ambience with a stasis field with another machine in the background.	0	Stasis field.
d3_citadel.combine_ball_room	Harmonical combine balls passing by with more Citadel ambience.	0	Ball field.
d3_citadel.general_control_room	A combine console with Citadel ambience in the background.	0	Combine computer terminal.
d3_citadel.alyx_teleport_control_room	Various teleport-discharge sounds; machinery audible.	0	Combine computer terminal.
d3_citadel.final_portal_chamber	Loud, somewhat windy machinery sounds; occasional teleporter discharge sounds.	0	Combine computer terminal.
		1	Combine computer terminal.
		2	Loud noisy central portal beam.
d3_citadel.top_of_teleport_chamber	High-pitched buzzing; city combat sounds audible.
d3_citadel_01.pipe_entrance	Alarm sound with combat sounds and wind gusts.
d3_citadel_01.cliffside1	Metal creaking and loud wind with the city alarm in the background.
d3_citadel_01.citadel_entrance	Same as above only silenter and with the citadel ambience slightly audible.
d3_citadel.breen_field	Nearly the same as breen.office but with deep metal scraping sounds.
d3_citadel.breen_hall	Deep vent sounds and occasional jet-like sounds and very very light combine marching sounds.
d3_citadel.breen_office	Almost identical to above, some sounds are just a little bit quieter and it uses another DSP type.