Actually it seems many software volume sliders do[1]. Although you're right that an ideal volume control should be logarithmic. My main point still stands that

Actually it seems many software volume sliders do[1]. Although you're right that an ideal volume control should be logarithmic. My main point still stands that at half the amplitude or half the energy (perceptually half the volume) you're only losing half a bit to a bit of resolution. And even at -20 - -30dB, with 4-5 bits of resolution loss, you're probably not going to notice the degredation. [1](http://www.dr-lex.be/info-stuff/volumecontrols.html http://www.dr-lex.be/info-stuff/volumecontrols.html)