AssemSaqr

After extensive research I have finally found the siren strings for ELS and all but two siren tones are now working in-game!
 
They seem correspond to the OpenIV assigned names but they have the beginning part of the string added. These were all found by me personally through research and experimenting, so you're welcome (also would appreciate this being a pinned topic for others to find). From what I gather the string is basically referring to the location of the siren file in the game's archive ('RESIDENT' being the RESIDENT.rpf and 'VEHICLES' being vehicles.awc, followed by the siren name). Strangely, the siren names identified by OpenIV for the main LSPD tones and the Sheriff Granger tones don't work so I will need help with that. Anyway, enjoy!
 
 
LSPD Main Police Siren:
"VEHICLES_HORNS_SIREN_1" - Police Primary
("RESIDENT_VEHICLES_SIREN_PA20A_WAIL" doesn't work for some reason)
"VEHICLES_HORNS_SIREN_2" - Police Secondary
("RESIDENT_VEHICLES_SIREN_2" doesn't work for some reason)

Firetruck Siren:
"RESIDENT_VEHICLES_SIREN_FIRETRUCK_WAIL_01" - Firetruck Primary
"RESIDENT_VEHICLES_SIREN_FIRETRUCK_QUICK_01" - Firetruck Secondary

Police Bike Siren:
"RESIDENT_VEHICLES_SIREN_WAIL_03" - Police Bike Primary
"RESIDENT_VEHICLES_SIREN_QUICK_03" - Police Bike Secondary

Sheriff (Granger) Siren:
"RESIDENT_VEHICLES_SIREN_WAIL_04" - Sheriff (Granger) Primary
"RESIDENT_VEHICLES_SIREN_QUICK_04" - Sheriff (Granger) Secondary
^ These two aren't working for some reason

FIB Siren:
"RESIDENT_VEHICLES_SIREN_WAIL_02" - FIB Primary
"RESIDENT_VEHICLES_SIREN_QUICK_02" - FIB Secondary

Ambulance Siren:
"RESIDENT_VEHICLES_SIREN_WAIL_01" - Ambulance Primary
"RESIDENT_VEHICLES_SIREN_QUICK_01" - Ambulance Secondary

Siren Warning/Priority Tones:
"VEHICLES_HORNS_POLICE_WARNING" - Police Warning
("RESIDENT_VEHICLES_POLICE_WARNING" doesn't work for some reason)
"VEHICLES_HORNS_AMBULANCE_WARNING" - Ambulance Warning
("RESIDENT_VEHICLES_AMBULANCE_WARNING" doesn't work for some reason)

Siren Horns:
"SIRENS_AIRHORN" - Airhorn
("RESIDENT_VEHICLES_AIRHORN_EQD" doesn't work for some reason)
"VEHICLES_HORNS_FIRETRUCK_WARNING" - Firetruck Horn
("RESIDENT_VEHICLES_FIRE_TRUCK_HORN" doesn't work for some reason)
 
 
My three requests are:
1. Why are a few of them not working, particuarly the Sheriff Granger ones? Could someone with knowledge help?
2. Can we get an AI Sirens mod that makes the AI change siren tones based on the vehicle's VCF siren setup?
3. Is there any way to remove the pitch filters that are applied to some of the sirens? (e.g. the ambulance and fire truck sirens in-game are lower pitched than the actual file itself)
 
 
Cheers everyone.

So you downloaded a fancy 2015 Tahoe and installed it in the police3 slot, only to find that it rolls more than your eyes when your boss is talking to you.  Does your Silverado not drive like a truck should? or maybe your '15 Charger doesn't feel right.    There are a lot of options to choose from when deciding which handlingid you want to use for your car.  I've compiled a list of what I use for handling lines, and thus far, all have worked just fine.  For some of them, such as the Silverado and Expedition, someone else might of found a better handling, and if that's the case, please comment below letting me know what you're using and I'll give it a shot. 
 
Some people like to edit the handling.meta.  This is not a requirement, the handlingid is all you need to touch if you just want the basics.  Handling.meta is there for those who know a bit about modding and want to refine the handling lines to feel realistic.
 
For those that might be confused on what the handlingid is, it's one of the top lines in the vehicles.meta.
 
Here's an example:
 
<handlingId>police3</handlingId>  
All of these will be for police vehicles, I will not be covering modded civilian cars.  Also note that this topic really only applies to those who have modded their police fleet.
 
 
Crown Vic
 
police  
 
Dodge Charger
 
If 09-10 version, police2  If 2013+ version, buffalo2  
 
Ford Taurus, Chevrolet Caprice and Chevrolet Impala 
 
police3 (this is meant for smaller vehicles, such as the Impala) premier (this is an alternative for smaller vehicles, such as the Impala.  Use this if you don't like the way police3 feels)  fugitive (this is meant for bigger/heavier cars, such as the Taurus) felon (this is an alternative for bigger/heavier cars in case you don't like Fugitive)  
 
Ford Explorer 
 
gresley  
 
Chevrolet Tahoe 
 
baller baller2  
Ford Expedition
 
fbi2  
Chevrolet Silverado
 
sandking  
Dodge Durango
 
baller  
Dodge Challenger
 
gauntlet  
Ford Mustang
 
dominator  
Ford Fusion
 
tailgater (There is most likely a very better choice out there, I'm just not sure which would work)  
BMW motorcycle
 
policeb  
Ford F-150
 
sandking  
Ford F-350
 
sadler  sandking - may work for this as well, not confirmed  
Chevrolet Corvette
 
coquette  
Chevrolet Avalanche
 
sandking  
Chevrolet Camaro
 
gauntlet  
Nissan GTR
 
elegy  
Land Rover
 
baller  
Hearse
 
romero  
Dodge Polara
 
glendale