[sdiy] opto LFO

[Gavin]

this is true, in the old buchla lowpass filters you can turn the cutoff knob
up real fast and then listen as the filter slowly opens up, it's actually
very beautiful...
----------
>From: Peter Blackett <dragon.servicing at virgin.net>
>To: synth Diy list <synth-diy at dropmix.xs4all.nl>
>Subject: Re: [sdiy] opto LFO
>Date: Thu, Jan 16, 2003, 5:40 PM
>

>Hi,
>just a quick comment that if you do sue an LDR then they will be a
>slight delay as you change from one speed to another ,as from what I've
>been told the resistance of the LDR doesn't change instantaneously.
>but this does simulate the behavour of the rotary Speaker effect units
>[Leslie speakers ] when they change from a slow rotation speed to fast .
>[ or from fast to slow ].
>more info on Leslie speakers at http://www.captain-foldback.com
>details of one  other instrument that use light sources and
>photodetectors ,the photosonic instrument
>can be found at 
>seamonkey.mle.ie/nime/Proceedings/paper/arfib.pdf
>more info on NIME themselves can be found at 
>http://www.nime.org
>
>regards Peter