Re: Doepfer A-100 Modular

From Mark Kolmar
Sent Fri, Apr 21st 1995, 23:31

I should be getting some photocopies of info about Serge in the near
future.  I'd very much like to get the info on Doepfer too.

I was looking at the Paia kits.  The prices are good (like $40 or so for a
ramp/pulse/triangle VCO), but it will of course take some time to assemble
the stuff.  Adding in the cost of the pots and jacks, which are not
included, and cases, may change the balance.  Someone on here also
suggested the Paia VCO may not be as stable as it could be. 

I'm eager to get at least a modest modular system together and expand over
time.  Maybe $500 to start.

However I really want to use this stuff as a composer and musician, not an
electrical engineer.  What attracts me to a modular setup is the
routability that digital synths don't offer.  Not the 303 Acid (tm) sound,
warmness, or anything else.  To the degree that such a beast would need to
be calibrated daily, or a number of other things that aren't necessary
with digital synths, it would be a pain in the ass. 

I'm concerned about how compatible modules from one manufacturer are with
those from another, and how other circuitry (e.g. guitar pedals, DSP,
external audio) will work in the signal path.

(For example, I used a very modest modular at the U of Ill.  We weren't
really supposed to do stuff like this, but I plugged a bass guitar into 
at least one of the CV inputs.  It worked great.  Was I just lucky or can 
you do that kind of thing without worry and expect it to work?)

A good volume of mail on this list seems to be people asking "how to I
drive my XXX with my YYY..."  Although these questions mostly seem to do 
with sequencing.  I'll need good MIDI to CV (incl. velocity and hopefully 

I know I'm not quite asking a clear question here, but if anyone can offer
some general comments on the subject, I should be able to formulate more
specific questions.  I'm intimately familiar with this stuff at a "black
box" level, but once you get into electrical specifics, ICs, and so
forth...well, it's not my strong point.  I know a resistor from a diode, 
and I'm comfortable with a soldering iron, but not much beyond that.

Specific topics: 

- Connecting anything to anything else and expecting it to work
- MIDI to CV
- Stability/calibration
- Potential hazards while experimenting with feedback loops

Thanks in advance...


On Fri, 21 Apr 1995, Marc Mcnulty (MUSIC) wrote:

> !hola!,
> 	I need to thank Stefan Gruhl for sending me the info on the 
> Doepfer A-100 Modular system.  It looks just a Serge (sort of).
> 	I priced up a system for: $1170. U.S.  It includes:
> 	3 VCO's ($100. ea)
> 	1 Wave Shaper ($50.)
>  	1 Divider ($50.)
> 	1 Ring Mod/Inverter ($50.)
> 	1 Mixer 4:1 ($50.)
> 	1 VCF ($80.)
> 	1 VCA linear ($70.)
> 	1 VCA log    ($70.)
> 	1 Clock Divider/Sequencer ($80.)
> 	1 Noise/Random ($50.)
> 	3 LFO's ($50. ea)
> 	2 ADSR ($60. ea.)    
> 	These prices are amazing!  I am curious about the qulaity.  The
> modules appear very flexible and nothing is pre-patched except for power.
> I am really curious, i was going to get a Serge, but if this is reality 
> than my $'s will become DM's (sorry, but I on a budget).
> Marc
> -Photophobia