[sdiy] PSIM-1 endorsees

[Tim Parkhurst]

ALL YOUR ENDORSEES ARE BELONG TO US!

Tim (your base) Servo

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> -----Original Message-----
> From: harrybissell [mailto:harrybissell at prodigy.net]
> Sent: Thursday, March 04, 2004 6:12 PM
> To: john mahoney
> Cc: synth-diy at dropmix.xs4all.nl; nN AAt e e
> Subject: [sdiy] PSIM-1 endorsees
> 
> Hah... your small group... are all ENDORSEES !!!     ;^P
> 
> They offered me but, of course as you all know... I cannot be bought.
> 
> Aren't those BBDs the best thing since sliced bread ???
> 
> H^) harry   (this is of course, all lies :^)
> 
> john mahoney wrote:
> 
> > In most cases, a programmable device would be overkill. If you insist,
> > though, it's a no-brainer: the PSIM-1.
> >
> > The PSIM-1 has 4 CV inputs, 4 CV outputs, and a Hitachi microprocessor
in
> > the middle. You could write your own conversion program in BASIC, but
there
> > are already 2 quantizing programs in the Yahoo group files area. There
is a
> > 4-channel chromatic quantizer and a "1 ch Quantizer with ch2 in cv
> > controlled quantization resolution." Just modify one of them and you're
> > done. More info is at http://www.synthmodules.com/. (I am not affiliated
> > with synthmodules, I merely own a PSIM.)
> >
> > Anyway, to scale a control voltage linearly, I believe that all you need
are
> > adjustable attenuation, gain, and offset. In other words, a couple of
pots
> > and an op amp.
> >
> > However... Some old gear (old Korg and PAiA, for example) uses linear
VCOs
> > (V/Hz) instead of exponential VCOs (V/octave), and that's a bigger
problem.
> > There are a few ways to handle that, one of them being a PSIM-1.
> > --
> > john
> >
> > P.S. Everybody, *please* forgive the enthusiasm of the small group of
PSIM
> > users. We're excited! This is the Swiss Army Knife of modules. That's
been
> > said of other modules, but it's really true of this one. Nothing else
can
> > assume so many personalities, and nothing else has such an easily
> > programmable brain. Okay, I'll stop. For now...
> >
> > ----- Original Message -----
> > From: "nN AAt e e" <timexheater at comcast.net>
> > To: <synth-diy at dropmix.xs4all.nl>
> > Sent: Thursday, March 04, 2004 6:32 PM
> > Subject: [sdiy] Programmable ICs / Scaling
> >
> > > i just got to wondering how one would go about say... taking something
> > like
> > > a performance synth that may not be 1v/oct and doing the math to
figure
> > out
> > > what the scale is, then make something to convert it to 1v/oct...
> > >
> > > ...while mostly using programmable ICs as to make it [slightly] easier
to
> > > deal with math problems.
> > >
> > > i know this isnt very hard to convert old korg/paia standards to
roland
> > > using analog based converters, but what would be good ICs to check out
> > that
> > > should be able to handle the voltage ranges of a synth? it doesn't
seem
> > like
> > > it would be too difficult using something like PICs or Stamps, but i
> > havent
> > > really worked with either of them before.
> > >
> > > has anyone here made any custom scaling devices?
> > >
> > > this would probably be only used for cv output [nonstandard-> 1v/oct],
but
> > > 1v/oct inputs would be pretty cool later on too.
> > >
> > > - nate
> > >
> > >



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