[sdiy]

[harrybissell]

I'm going to build a custom CV interface and attach it to my
Theremin qunatizer.  The theremin quantizer used to have a PV-1
pitch to voltage converter, a custom quantizer (A/D, lookup EPROM,
D/A and MIDI out).

The MIDI out was done by S-DIY alumnus Roman Sowa... who only lurks
occasionally at this time.  He did some custom code for one of his
PIC controllers to accomodate my special needs.

I'm hacking the Doepfer first, as it will allow pressure and pitch.

I'm sure that the "CVS" project might yeild an appropriate interface as
well.

I control a custom, hacked. EFM rackmnount synth (2 VCO, 1 VCF, 1 LFO)
via CV control and a Matrix 1000... and  YAMAHA TX-81Z.

For those interested... I could part with the TX-81Z for just under
$1000
considering the recent run-up on the DX-7 resale market  <extra-huge
BFG>

I'm looking forward to the challenge of the three zones of the Kurzweil.

<fwiw> I'm working on a special project at work.. to determine when a
particular
event happens based on a sudden decrease in a certain parameter. I
~laughed~...
if I can make a guitar P/V happen with envelope follower / detector...
their
silly- at ss problem is a no-brainer.  What is a simple 10% drop in a
fairly
noisless parameter compared with something that has multiple peaks and
multiple
zero crosses per cycle ???   :^P

H^) harry


> What are you going to use as a 'controller' for it?
> Dave
> 
> At 06:22 PM 4/15/2006, harrybissell wrote:
> >I bought the Expressionmate as well...
> >
> >I'm playing with the Doepfer I also bought, first... as it has
> >pressure and position sensitivity.
> >
> >My interest is to have one long ribbon, quantized. I have the quantizer
> >from my Midi-Theremin setup.  I got the idea for a ribbon controller
> >for it when I let a freind play it for the first time. and he moved his
> >hand
> >across the ~top~ of the theremin rather than in the air near the
> >antenna...
> >
> >I thought... <<you dumb fvck... that's NOT how you do it its not a
> >ribbon
> >controller... HEY wait... it COULD be a ribbon controller...>>
> >
> >H^) harry
> >
> >David Brown wrote:
> > >
> > > At 09:57 PM 4/14/2006, David Brown wrote:
> > > >Now to write a PSIM program for a single or triple ribbon
> > > >controller.  I think I will wire 100K resistors from the 'wipers' to
> > > >a voltage higher than across the resistors.  That way I can tell
> > > >whether the ribbon is in contact (output voltage between the
> > > >resistor voltage) or not in contact (output voltage higher than the
> > > >resistor voltage).  I'm thinking that just a diode drop would do.  I
> > > >can run the ribbon off of +5.7 volts with each section at +5
> > > >volts.  That way I can do a return to center and know when to
> > output a gate.
> > >
> > > I went the other way.  I added a diode in series with the ground
> > > connection. This limits the lowest voltage I can generate with the
> > > ribbon to 0.6 volts.  I rely upon the input impedance of the PSIM
> > > (100K) to read 0 volts when there is no contact with the ribbon.
> > Works fine.
> > >
> > > I've smoothed the transitions across the three ribbons.  It's not
> > > quite perfect but I'm not sure if you would notice if you didn't know
> > > where the transitions are.  It's at least as good as the Expressionmate.
> > >
> > > Who else bought a PC-2?  Did you get your's yet?
> > > Dave