LDLB

GTA 4 (not tested in GTA 5) - This is the LTS Siren Dual Tone Mix siren modification for GTA 4. This siren is commonly heard on the New Zealand Fire Service (NZFS) fire trucks. This siren sounds very similar to  what it's like in real life! ;) A great quality siren - great thanks to FederalPolice620 for the initial recordings. 
 
- Wail
- Mix (Wail & Yelp)
- Yelp
- Airhorn
 
Credits: 
Many thanks to - FederalPolice620
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Woodway Commander 3 siren modification for GTA 4. This siren is commonly heard on the older London Fire Brigade (LFB) Atego's. This siren sounds very similar to  what it's like in real life! ;) One of my best quality sirens yet - great thanks to policeblue999 and FrogFootTV for the initial recordings. 
 
- Wail
- Yelp
- Hi-Lo
- Bullhorn
 
Credits: 
Many thanks to - policeblue999 and FrogFootTV
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Whelen Alpha siren modification for GTA 4. This siren is very commonly heard on many Fire and Rescue Service's in the UK, with the SA40 'lo-pro' speaker. This siren sounds very similar to what it's like in real life! The AMAZING two-tone siren is also featured ;) A great quality siren - great thanks to CobraEmergencyVideos, Stansted Fire Station, and me :)
 
- Wail
- Yelp
- Pier
- Two-Tone
- Bullhorn
 
Credits: 
Many thanks to - CobraEmergencyVideos
                           Stansted Fire Station
 
Check out my video on an Essex fire pump responding, using the alpha: https://www.youtube.com/watch?v=VMHcS4Q_QYo
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Hänsch Typ 620 siren modification for GTA 4. This siren is very commonly heard on many Metropolitan Police (Met) traffic motorbikes (BMW R1200), and also many German emergency vehicles. This siren is also known as the RSG/BMW siren, as BMW have distributed this siren on some of their vehicles. This siren sounds very similar to what it's like in real life! ;) A great quality siren - great thanks to moviadled.
 
- Wail
- Yelp
- Hi-Lo
 
Credits: 
Many thanks to - moviadled
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Federal Signal Smart Siren 2000SM (No Rumbler) siren modification for GTA 4. This siren is very commonly heard on many New York Police Department (NYPD) vehicles. This siren sounds very similar to what it's like in real life! ;) A great quality siren - great thanks to FlipSwitch Games.
 
- Wail
- Yelp
- Priority
- Horn
 
Credits: 
Many thanks to - FlipSwitch Games
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Federal Signal EQ2B siren modification for GTA 4. This siren is very commonly heard on the Fire Department of New York (FDNY) fire trucks. This siren sounds very similar to what it's like in real life! ;) A great quality siren - great thanks to FlipSwitch Games for the initial recordings. 
- Wail
- Yelp
- Priority
- Air Horn
 
Credits: 
Many thanks to - FlipSwitch Games
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Motorola Spectra siren modification for GTA 4. This siren is commonly heard on the Los Angeles Fire Department (LAFD) and Seattle Fire Department (SFD) fire trucks. This siren sounds very similar to what it's like in real life! ;) A great quality siren - great thanks to dniles433 for the initial recordings. 
- Wail
- Yelp
- Hi-Lo
- Air Horn
 
Credits: 
Many thanks to - dniles433
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Federal Signal PA4000 siren modification for GTA 4. This siren is commonly heard on the FDNY Ambulance's wailing in NY. This siren sounds very similar to what it's like in real life! ;) A great quality siren - great thanks to A. Guinta for the initial recordings. 
- Wail
- Yelp
- Priority
- Horn 
 
Credits: 
Many thanks to - A. Guinta
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the Powercall 6-Adam siren modification for GTA 4. This siren features the powercall and 6-adam tones. This siren sounds very similar to what it's like in real life! ;) A great quality siren - great thanks to Turner Griffin for the initial recordings. 
- Wail
- Yelp
- Powercall 
- 6-Adam
- Horn 
 
Credits: 
Many thanks to - Turner Griffin
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is the London Fire Brigade (LFB) Fire Rescue Unit (FRU) siren modification for GTA 4. This siren is commonly heard on the older London Fire Brigade (LFB) FRU Atego's. This siren sounds EXACTLY what it's like in real life, and has the AMAZING hi-lo! ;) A great quality siren!
- Wail
- Yelp
- Hi-Lo
- Bullhorn 
 
Enjoy :D

GTA 4 (not tested in GTA 5) - This is a Federal Signal Vama AS320 siren modification for GTA 4. This siren is very accurate to what it actually sounds like in real life :D
- Wail
- Yelp 
- Two-tone
- Airhorn 
 
Installation instructions and credits within the readme file. 
 
Enjoy :D