Before we dissect the speech, we must understand the container. Rockstar Games uses a proprietary archive format known as (Rockstar Protection File—or simply "Rockstar Package File").
A common myth in the GTA modding community is that GTA IV uses full procedural lip-sync (like Source Engine or Mass Effect ). It does not. gta 4 speech rpf
When Niko says, "Big American titties," the game isn't moving his mouth phonetically. It’s playing the sound and simultaneously telling the face rig to hit key shapes: "Open Jaw (20ms), Close Jaw (40ms), Smirk Left (60ms)." Before we dissect the speech, we must understand
: Conversations you overhear while walking down the street. Before we dissect the speech
You can find these files in your installation directory, typically located at: Grand Theft Auto IV\pc\audio\Sfx