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 application 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 applications 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 fine-tune the volume (not just toggle between pain and no sound as it is now).
Are there any hidden configuration setting (or configuration files; I use Linux at work, so I don't mind hacking configuration files either) where I can globally modify the sound level, so that the volume buttons are actually usable?
Shift-Option-VolumeKey
or going to Audio MIDI Setup.app in Utilities.