I've been trying to investigate this ingame and not being able to find out why this is happening. Combat is very, very quiet when fighting solo. Enemies very rarely ever have sounds when they attack, and my character typically doesn't makes any sounds. Sound settings are positive, and I do hear opening of doors, music when transitioning between areas, activating toggles, and specifically, any archetype powers (like Heavy Blow from Street Justice) but not Brawl, Kick (from Fighting Power Pool), enemy basic attacks, Prestige Powers like Taser - none of these things make any sounds.
Verified and re-installed to the same issue. Given that some attacks have sounds, but others don't means maybe the files aren't used for certain sounds perhaps? I've tried searching the forums but was unable to identify if this has been previously reported.
Fairly standard old-system here, but no sound issues with other programs, softwares, or games. Any assistance would be appreciated, the silence makes the combat feel very lacking.