Yea these specific ones came from roblox, but most roblox sirens come from lspdfr, if you listen to the wail closely, theres a sound effect that sounds like a rev in the wail wind up. They prob are from lspdfr though.They sound similar to standard whelen tones but heavily compressed or modified to avoid copyright.
If you're taking about GTA LSPDFR, the tones never sound exactly like they do irl.
Yeah that's what I was suspecting, appreciate the reassurance on that.These tones sound the most like the Whelen CenCom Gold to me. I'd say it's probably 100% the gold.