Radiohead

[danial stocks]

>
>I just watched Radiohead play on Saturday Night Live(a 
>nationally-distributed
>television show for those outside the USA); the keyboardist had behind him 
>a
>large modular, played some synth or other with wooden side panels and some 
>knobs
>and sliders.....with an interesting controller : attached to his finger was 
>a
>string which ran into the the left side of the keyboard. As he pulled on 
>the
>string, the pitch increased; as he let it retract, the pitch decreased. He 
>did
>his vibrato very nicely with it.
>
>Does anyone have any ideas as to how to implement this? I don't know the 
>first
>thing about gears and such, but the best that I can think of, is using some
>mechanical parts to scale the half-meter or so range of motion on a 
>keyboard to
>the few centimeters range of motion on a pot.
>

could use a 10 turn pot with a large pulley attached.. suppose a 3cm dia 
pulley, this would be approx 10 cm circumference, so 10 turns of this = 
1metre... or even a normal 300 degree [5/6 of a turn] turning pot.. 50 cm 
300 deg would give a 60 cm circle circumf. which would be a approx 20cm dia 
pulley on a normal pot. or you can get really long sealed sliders which look 
like mini hydraulic cylinders used in industrial apps.. or a spring attached 
to a strain guage? sliding metal plate acting as variable capacitance in a 
theremin stlye setup? optical sensor?
cheers,
Dan
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