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Re: Alternative foot-operated controllers

9/1/1999 1:08 PM

GFR

Re: Alternative foot-operated controllers Some options for alternative foot controllers:         1) A LED/LDR combo, and a plastic stripe between them that goes from transparent at one end and black at the other end, attached to the pedal. You could use ink jet transparency and changing the taper by changing the "shading" of the stripe - print another stripe and you've got a new taper. Also when the pedal is at a fixed position the fx stays the same. I think it's the Morley approach.         2) LED/fototransistors combos and a plastic stripe with black bars, this fires an up/down digital counter (like in a computer mouse - you could even salvage a mouse for the parts) that selects a memory position and then to a D/A multiplier. You change the taper by changing the contents of the memory. Before using it, you need to "reset" it so it knows where it is, but once in use, if you leave it in a fixed position the fx stays the same. The foot controllers on my ART X-15 midi pedalboard are somewhat like this.         3) What about something like above in a "track ball" format? You could roll the ball with your foot and get two independent whas.         4) A Hall effect device like BOSS used in some of their whas. The proximity of a magnet changes their resistance. Difficult to change the taper. If you leave it in a fixed position the fx stays the same.         5) Strain gauges. Difficult to change the taper. If you leave it the fx resets.