On Wed, 2014-08-20 at 07:37 -0700, Len Ovens wrote: > However, Mixers don't look like that, the area from plus 10 to -10 > takes up a whole lot more room on the fader travel than anything lower > than that. [snip] > > It appears that faders do not have linear or log taper, but rather > some custom taper
"Audio taper The most used non-linear taper is the logarithmic (log) or audio taper. This is mainly used for audio volume control, to obtain a more natural ‘linear’ perception in sound intensity change when you adjust the volume. Because the human ear is sensitive to sound intensity in a logarithmic fashion, at low sound intensities a small change in intensity is perceived as a big change in loudness, while at high intensities a large change is required for the same change in perceived loudness. To compensate for the ears logarithmic behavior, audio taper pots were developed. While it is called logarithmic, it is actually an exponential curve (the opposite of the logarithmic behavior of the human ear). Sometimes inverse logarithmic (anti-log) pots are used, for example in audio controls which turn counterclockwise, but also in some other specialized applications. The dashed lines in the graph below show the ‘real’ logarithmic curves. In practice logarithmic types which are used for audio applications do not really behave in a correct exponential way, but follow the curve stepwise."- http://www.resistorguide.com/potentiometer-taper/ "P&G [snip] have a real Logarithmic law.... (Alps is a “Audio Taper”)" - http://www.gearslutz.com/board/3027091-post6.html _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
