AntonSovouchka

Hi everyone, I’m having a very frustrating issue with the Tupolev 134 addon in FS2004 (FS9) — the sounds (cockpit buttons, announcements, specific aircraft audio) work perfectly on one PC (laptop - WindoS 7), but on my main simulator PC (desk computer - window 10) they don’t play at all, even though: • The exact same files were copied from the working PC • All audio works for other aircraft on the simulator PC • I tried registry fixes, FSSoundDLL prompt, reinstalling the Tu‑134 addon, checked all Windows audio settings, restored the system, and compared settings between both PCs • FS2004 is installed in the same relative location with the same config I suspect something machine/environment specific but I’ve been unable to identify what it is. What I have tried so far: Copied identical files from the working PC Reinstalled the Tu‑134 addon Tested FSSound and allowed DLL loading Restored Windows registry with system restore Verified audio device, sample rates, Windows configuration Compared registry and FS9 settings between both PCs No antivirus or permission issues Symptoms on the simulator PC: Engine sounds play Standard FS9 sounds play Specific sounds for this aircraft do not play No errors beyond FSSound DLL load prompt Question: Has anyone seen this behavior before? Any obscure setting or registry entry that could explain why this aircraft’s sounds won’t play on one machine but do on another with the same files? Thanks in advance for any help!