[sdiy] [partly off topic?] Nonlinear Filter E.Guitar Test

[Scott Gravenhorst]

It's a distortion box.  Not like the usual though.
It plays differently.  Playing dynamics have a 
different effect and feel.  Some very nice sounds
are possible.  There are also ways to make it sound
like crap.  There are 6 controls to noodle
even when using an audio source like e.guitar.
Because it's a filter, it does filter like functions,
but adds distortion as well.  Audio sources are why
I built in a cutoff control and an LFO to modulate 
cutoff.

One other thing:  I'm not exactly sure how this is
happening, but I swear there are times when this
box has pitch or frequency shifted (not sure which)
the attack portion of a sound when I have it plugged
into a monosynth.  It's a brief effect, probably less than
a quarter second in length, but long enough to
perceive what sounds like portamento from some 1 or 2
semi tones below the intended note up to it.  Rather
cool, since the notes that do it, will do so consistently
as long as I don't touch any controls.  When this occurs,
there is also a strange disharmonic structure along
with what I'd call a fundamental...  It's hard to explain
because it sounds rather wierd, natural yet alien.  And
it's a thing I stumble upon by accident, not by design.
Most unfortunate.

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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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