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Doepfer

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Re: Freq Shifter : heard from he man himself

2002-06-21 by petergrenader

he didn't go into it.  I would think he wouldn't be too keen in giving 
us the means to mods. 

This shouldn't be that much of a problem though.  I'm getting 
mine today, give me a wekk ro so to get aquainted and let's see 
what can be done.  I'm no Einstien, but I have had luck with a few 
simple mods of Doepfer, Analogue  Systems and Analogue 
Solutions gear.

Speaking of which, if anyone wants to add a pure pulse out (very 
very short on-time) to a Doepfer LFO, get in touch with me 
off-line.  There is a way of doing it using the square out that 
involves two passive components in a simple RC config that 
could by added either under the faceplate  with a new jack added 
(as I did it) or even be incorpotaed into a special patch chord that 
would be used for this conversion only.

best,

P


--- In Doepfer_a100@y..., "code_pig" <code_pig@y...> wrote:
> But did he say (or is it possible) to lower the shift range, or is it 
> more trouble than it's worth?
> 
> --- In Doepfer_a100@y..., "petergrenader" 
<petergrenader@h...> wrote:
> > Got a note from Dieter last night, who saw these listings and 
he 
> > went into the theory behind the Shifter and how it cancels out 
the 
> > second sideband to isolate the sum and difference.  Much as 
I've 
> > always heard its done, by [hase cancellation using the 90 
> > degree output of a quadrit. oscillator.  It's a very complex 
> circuit.

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