Currently when using headphones on my MacBook Pro the volume goes from completely silent at 0 bars fairly loud at 1 bar (6%) very loud at 2 bars (13%) and everything above is painful. (Unless I for each app that provides its own slider changes the volume of this to about 4-5%, which is annoying and risky)
I'd like to adjust the "base volume" for all apps on the computer, lower it radically so that when I use the global volume buttons 50% is about comfortable 75% would be somewhat loud; e.g. I can actually use those buttons to finetune the volume (not just toggle between pain and no sound as it is now).
Are there any hidden config setting (or config files; I use Linux at work so I don't mind hacking config files either) where I can globally modify the sound level so that the volume buttons is actually usable?