Have you ever wondered why the new OASYS, Nord Modular G2, etc. have digital rotary knobs with the LED lights on the base of the knob? The knobs have a problem: when one does not look at the knobs from top, the LEDs are hidden by the knob itself and thus the value may go unseen. It appears that Euphonix (http://www.euphonix.com) has a patent on the knob where the LEDs are on the top of the knob (instead of base). LEDs are always visible. Why I wanted to tell all this is that prior the patent, when we had an electronics club at our elementary school, we came up with this patented knob design -- and we thought and laughed that it already must have been patented multiple times. Wrong. I have made an alternative design by now. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software