This siren mod pack is also on lcpdfr.com

Warning: There are reports that certain audio archives have been muted in game regardless of rather the sound mods were installed properly or not. To ensure that the audio archives for vehicles won't be muted in game make sure that the vehicle.oac file or the vehicle.awc file doesn't exceed over 15.75 MB in size (you can check the size of the vehicle.awc file in OpenIV under RESIDENT.rpf) and make sure that the siren sound audio files have the appropriate bitrate/sample-rate/etc (32000hz, 16bit mono, 512kbps) for the vehicles.awc file. Hopefully this will resolve the issues regarding muted sirens in game. If not then please let me know so I can farther troubleshoot this. Other than that, please enjoy this siren sound mod!

This is a Federal Signal Vintage siren sound mod pack to replace the emergency vehicle sirens in the game.

Federal Signal PA-15A - Main Police and Ambulance sirens
Federal Signal PA-5 - Fire Truck sirens
Federal Signal PA-300 (Intimidator version) - Sheriff SUV sirens
Federal Signal PA-200 - FIB SUV and Buffalo sirens

Be sure to download the latest version of OpenIV and run it as administrator. Also be sure to backup your data before installing this mod.

If you have any questions regarding this siren mod please let me know in the comments below. I hope you all like this. =)

Please note that if you are using the steam version or the disk version of this game, it's recommended that you create a mod folder before installing this mod. You can find the tutorial on the OpenIV website here:
openiv.com/?p=1132

Tools Used:
AVS Audio Editor (for file conversion and sampling)
Audacity (for audio editing and tweaking)