Doepfer

By the way, I forgot to mention that my example below requires a DC 
coupled ring modulator, so it will not work with the A114, though it 
works with a PAIA 9710.  It might also work with the Doepfer A-133 
Polarizer, though I don't have this module yet and haven't tried 
it.  If anybody has a 133 one and feels like trying the patch, 
please let me know if it works.

--- In Doepfer_a100@yahoogroups.com, "shm1400" <shm14@h...> wrote:
> The recent poll on the Nord Modular style clocked random generator 
> got me thinking about the Nord Modular's ring modulator.  It has 
an 
> additional control that varies the modulation from ring to AM to 
> none, which can also be "voltage" controlled.  This is extremely 
> useful and I don't know of an analog ring modulator that does this 
> out of the box. 
> 
> I have been trying to do something similar using existing 
modules.  
> It is my understanding that ring modulation differs from AM in 
that  
> the carrier is inverted when the modulator is negative. Also, in 
the 
> Nord, when the control is zeroed and there is no modulation, it 
> simply passes the carrier unaltered. 
> 
> So, to model the nord's ring modulator, I have started by adding 
an 
> offset to the modulator so that it is all positive (or, better, 
> negative), then attenuating the signal with a VCA (this 
attenuation 
> is the "ring to am to nothing" control) then adding another offset 
> to make the modulator AC again when the VCA is full open, and 
> sending that signal to the ring modulator's modulator input.
> 
> Is this correct?  Does anybody have an easier way of accomplishing 
> this same end?  Does anybody know of an analog ring modulator that 
> does this without outboard stuff?  Hey, could this be an idea for 
a 
> new module?