I found this mod called  LAPD Police Scanner that requires you to use the music radio, but unfortunately GTA V does't allow you to use the music radio in cop cars. That's why LAPD Police Scanner suggests you use the Music Radio Enabled for Police Vehicles script. Unfortunately that mod isn't compatible with ELS. I've therefore tried using the "mobile radio" with Simple Native Trainer instead, but isn't an ideal solution since I only want the radio chatter while I'm in my car and not while I'm on foot. Not to mention it messes up my keybindings for taking cover and switching weapons. Is this something any of you might be able to help me with? I know there are alternative "radio chatter" mods such as More Radio Chatter, but that mod in particular along with Better Dispatch Audio are simply too loud compared to the rest of the game. 

Well, spotify is your best solution lol

LSPDFR 0.4 will enable the default game radio in police cars.

30 minutes ago, willpv23 said:

LSPDFR 0.4 will enable the default game radio in police cars.

Oh, really? That's fantastic, I did not know that was one of the new features coming with 0.4. Now I really can't wait for the update 😄 

In custom cars even radio doesn't work but you can on this in M menu