Low volume on AVI files

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http://askubuntu.com – When I play an AVI file the volume is really low while on other formats like mp3, mp4, flv, etc. it's good. I tried to use alsamixer and I increased the volume bars to the maximum but it doesn't work.. is there a way to fix that problem? I have a laptop and Ubuntu 11.10. Here there's a picture of alsamixer: (HowTos)