FS2004 (FS9) Sound & Audio Questions & Answers

FS2004 audio faults commonly appear after moving FS9 to Windows 10 or 11, when the simulator is muted by the system mixer, its legacy sound settings fail, or an add-on relies on missing or incorrectly aliased files. This hub covers total silence, missing engine and cockpit effects, and absent ATC voices.

The Fly Away team writes and tests the answers against practical FS9 setups, with checks for device selection, volume sliders, Windows compatibility, sound.cfg entries, aircraft installation paths and damaged voice packs. Guidance also separates simulator-wide failures from aircraft-specific faults, helping you decide whether to repair configuration, restore files or reinstall only the affected add-on.