Currently using vlc player 1.1.0
Creative Sound Blaster X-Fi Extreme PCI-E x1 audio cards in two Windows machines: XP MCE and Vista Home Premium
Volume in all video files (so far I've tested various 2ch/5.1ch MP3, AC3 & DTS in AVI & MKV containers and several DVD folders) is extremely low even maxed out to VLC's 200% and my system volume maxed out too. It's much quieter than any other media player I've tried the same files in at just 10% to 15% media player and system volume (kmplayer, mpc, wmp, quicktime, gomplayer, etc). It's so low in VLC in either PC of mine I can't understand what's being said at all in any video unless I turn off every other sound producing anything (A/C, fan, etc) in the room and hold my ear to the speaker, and even then I struggle with it. This is not normal. I have a fairly decent 50 watt 5.1ch speaker system in one of the computers that I don't think I've ever cranked the system volume above 50% for anything before even when blaring music that can be heard throughout the whole house.
Playing mp3 files the volume seems fine. Still not quite as loud as any of the above mentioned other media players though at comparable media player and system volume settings.
Trying to change any / all of the Audio settings (Normalize, etc) makes no difference whatsoever.
I've read a few other similar topics here. Deleting VLC's %appdata% folder made no difference whatsoever. Uninstalling and reinstalling VLC didn't make a difference either.
Also, perhaps it's related, I notice that when trying to increase/decrease Windows' system volume when VLC is the active window open it also increases/decreases VLC Player's volume at the same time. I have to click on the desktop or another window to adjust only the system volume. This did not happen in previous versions of VLC for me, nor does it work like that in any other media player except for WMP where the media player volume is also the system volume.