[sdiy] Henry Walmsley's page

[Scott Juskiw]

And I'd like to add that the 9 points of the waveform are voltage  
controllable as well. So you can change the wave shape " on the fly"  
which makes for some very dynamic timbre changes.

> As a shameless self-advertising, I'd like to bring up my  
> Inperpolating Scanner here, set to waveshaper mode.
> You can "draw" transfer functions with sliders, and with a triangle  
> signal for an input, it's basically the same as drawing
> waveforms. But the individual points are connected with linear  
> segments (not staircases), so it's less gritty than a staircase
> approach would be. In my implementation, the number of points is  
> limited to 9, but the good part is that you can choose any number
> from 2 to 9, depending on the input level of the triangle signal, so  
> you can get "unusual" harmonics, *and* you can change them
> dynamically by just modulating the input level of the triangle signal.
>
> I know most people buy these PCBs for other applications (well,  
> scanning and crossfading), but that piecewise-linear-drawn waveform
> stuff is a very interesting application of its own.
>
> http://www.jhaible.de/interpolating_scanner_and_scanvib/jh_interpolating_scanner_and_scanvib.html