Doepfer

Thanks for that info Dieter. Unfortunately my electronics skills are no existent!! I would have to get someone else to build it for me :-)

David

www.movingisliving.co.uk

Sent from my iPhone 

> On 18 Nov 2014, at 09:05, yahoo@doepfer.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> > -----Ursprungliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
> > Gesendet: Dienstag, 18. November 2014 08:39
> > An: doepfer_a100@yahoogroups.com
> > Betreff: [Doepfer_a100] Rate of change to CV and Cv change to gate
> >
> >
> > Hi,
> >
> > I'm wondering how to do two things.
> > 1) To create a CV based (proportional to) on the rate of change of another CV
> > 2) To create a gate when there is a step in a CV. This is particularly but not exclusively the output of a Intellijel
> > uScale - so when there is a new pitch I would like to create a gate.
> >
> > Hoping there is maybe a simple solution,
> >
> > David
> 
> This function was called earlier "new pitch detector". If I remember correctly such a module was available for the FORMANT
> synthesizer. So far nobody was asking for such a function. It's not very difficult if you have some experience with electronics:
> nothing but a differentiator (i.e. a capacitor/resistor with buffer, nothing but the "simple high pass" shown on the A-100 DIY
> page). One may add a full wave rectifier if both (positive and negative CV changes) should generate a positive voltage (otherwise
> the output of the differentiator generates a negative voltage for negative CV changes). To derive a gate a comparator with
> adjustable threshold ("sensitivity") has to be added (e.g. A-167).
> 
> Best wishes
> Dieter Doepfer
> 
>