Fine-tune volume and brightness in OS X
Normally, when you use the volume and brightness keys on your keyboard to adjust those output levels, your adjustments are made in whole steps on a scale of 1 to 10. But there's a keyboard shortcut that lets you adjust them more finely--and that keyboard shortcut has returned in OS X 10.7.4.
http://rss.macworld.com/click.phdo?i=6bd56f0d566646e65e230c368ee2222d