Kerbal Space Program

The human psychoacoustic system does not perceive sounds linearly, which makes the current volume sliders a bit awkward to deal with. (I basically have to make all my adjustments around the lower 10%-20% range)

“Idea” volume adjustments are logarithmic, but for games it's generally desirable to preserve the property of 0% mapping onto a signal level of 0, so an easy approximation you can use is to take the squared or cubed slider level. (A more sophisticated slider could be exponential with a linear slope near zero, which is how most hardware volume knobs on mixing devices etc. work)

For more information see e.g. http://www.dr-lex.be/info-stuff/volumecontrols.html

(e.g. a slider level of 50% would translate to a signal level of 0.5^2 = 0.25 or 0.5^3 = 0.125 instead)