heh, I asked about this awhile ago, seems there's no such thing though. What is it in particular you're getting a big volume discrepancy in? For me winamp would be at one level and half life was quite a few decibels above it. I just turned down the volume level in half life itself and its better, so maybe there are internal controls you can change for the programs that are outlandishly loud (or quiet), otherwise, good luck!