Leslie simulator

[tomg]

I didn't mean to sound like a know-it-all crap-head.......did it come 
across like that?? Sometimes I'm too short......Thanks for posting
this Doug and thanks to PAiA too, I think it was my first modulated
filter...ever!

Tom



> Hey, Doug
> 
> I built (DIYed) one of these and I one of those too (the 3900 one) long ago. 
> Sorry, but they are pretty much a waist of time. You would do much better 
> building one of my vc-bandpass (wah) filters and using a real lfo. If you have
> a modular just use a bp-filter and lfo. The problem is the that the filters are
> pretty lame...well...so are the lfos for that matter. Do you remember the BP
> demo-wave? There was a short spot at the end that sounded much like a
> Leslie....That was just a bpf and lfo.
> 
> Knowing that a Leslie is a 50W tube amp connected to a spinning motor- 
> driven 2 way cabinet. HF-horn and 15" bin. A more interesting version would 
> use hp & lp stereo panning filters and 2 motor simulator type lfos...meaning that 
> it takes a while to reach speed and it slows down when turned off. One for 
> panning and another for rate. I designed the lfos once, they are pretty cool. But 
> I never finished the filter/vca things...You also need a nice fet overdrive to 
> simulate the overdriven 50W tube amp.
> 
> Tom
> 
> 
> > OK folks, here is the Leslie article:
> > 
> > www.angelfire.com/electronic/epeasant/circuits/circuits.html
> > 
> > This looks like a swept filter design as well, Harry, probably a precursor to
> > the PAIA design you mentioned. I imagine you'll have a similar cynical comment
> > on this one ;-)
> > 
> > BTW, if anybody actually builds any of this stuff, it would be nice to hear
> > how it turns out. Thx.
> > 
> > Take care,
> > Doug
> 
>