RDR2 does not store audio assets as individual files in the installation directory. Instead, audio is packed into massive archive files to optimize streaming performance and reduce seek times on hard drives (and crucially for the PlayStation 4 and Xbox One generation of consoles).
: Many voice lines and cutscene dialogue are specifically packed in STREAMS_AS.rpf Steam Users rdr2 sound files
RDR2 has a known PC bug where the Windows Volume Mixer resets the game to 10% volume. Check your mixer settings after launching. Article: Exploring Red Dead Redemption 2 Sound Files
Audiokinetic’s Wwise (Wave Works Interactive Sound Engine) is the industry standard for interactive game audio. RDR2 uses .WEM files—these are not standard .WAV files. They use a proprietary codec (often Opus or PCM with special headers) that allows for dynamic mixing, reverb, and real-time audio triggers. Check your mixer settings after launching
Rockstar Games uses a proprietary format to store its massive audio library. You won't find simple MP3s or WAVs sitting in the installation folder. Instead, the game relies on (Audio Wave Container) and .rpf (Rockstar Package Format) files. Key Audio Categories Ambient Sounds: Dynamic weather, wind, and wildlife. Dialogue: Over 500,000 lines of recorded speech.
: The standard tool for opening and editing Rockstar's .rpf files. RDR2 Audio Tool : A specific utility available on Nexus Mods
The game’s audio data is stored within large archive files known as RPF (Rockstar Package Format) [16]. Specifically, audio assets are contained in AWC (Audio Wave Container) files found within the directory [16, 18].