[sdiy] 566 , was Re: Midwest Analog Product Books

[john mahoney]

> The 566 VCO chip is used by TH for percussion circuits, driving
noise
> generators, etc.

Yes, good point. Since percussion doesn't always need perfect tuning,
it's perfect for analog percussion. I think of Gnome-like devices as
being good for percussion, so I didn't think to differentiate -- but I
should have.

TH's 566 book has a chapter on swept noise ("A Tunable Noise
Generator"), which I imagine sounds something like what the Wiard
Noise Ring can do. It requires an external noise source and uses an FM
technique.


> John - can't remember off-hand, and no time to check (I'm fixin' to
take off
> for California), but if you increase the timing cap, doesn't that
enable
> lower frequencies where the waveform hangs together, thus making it
useful
> as an LFO?

I don't have a 566 running -- that is somewhere down my project list-- 
but the book didn't suggest that a larger timing cap would help (or I
missed where it says that). If so, that'd be awesome. I'll certainly
try it when I finally power one up.
--
john

(I try to write paragraphs without using the word "but," but it's not
easy!)