Doepfer

I sort of follow that (I think) but I'm not sure how the LFO as clock works in this - I don't want a regular gate but a gate that occurred only with a change of CV. So imagine that an LFO signal (possible modulated so it is not quite regular) goes into a quantiser (not A156!) and the quantiser puts out stepped voltages - I want a gate when the stepped voltage changes. (The reason NOT the A156 is that the uScale gives greater choice over what notes I'm quantising to) 

Maybe I've misunderstood the use of the LFO clock in your patch?

David

www.movingisliving.co.uk

Sent from my iPhone 

> On 18 Nov 2014, at 10:25, florian anwander fanwander@mnet-online.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Hello David
> 
> Am 18.11.2014 08:38, schrieb David Kellett davidkellettwoulf@yahoo.com
> > 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.
> 
> You've got several examples to solve the part #2 of your request; I call 
> it the change-to-trigger-converter, abbreviated CTC. As soon you have 
> this function, you will be able to create the rate-to-CV function:
> 
> You may do this on either on analogue level or with the help of methods 
> know from an A/D- an D/A-converters respectively.
> 
> The analogue method requires, that a change in the CV creates a trigger 
> pulse, which has always the same length and voltage: load a capacitor 
> with this pulses, unload the capacitor over a fixed resistor, and pick 
> the resulting voltage with a buffer. The more often a pulse arrives at 
> the capacitor, the higher will be the voltage at the capacitor.
> The disadvantage of this method is, that the voltage will always start 
> to drop, until the next trigger comes in.
> 
> The digital method is: have a clock running a digital counter, that 
> counts up. The trigger from CTC stores the value of the counter in a 
> latch, and resets the counter. The value of the latch is D/A-converted 
> into a voltage.
> Unfortunately you need a lot of modules for this:
> one LFO as clock
> one A160/161 as counter
> three A-148 as latches
> two A-138a Mixers as simple D/A.
> 
> This will be a 6Bit version.
> 
> Florian
> 
> @Dieter: do you pay commission if I recommend module-consuming patches? ;-)
> 
>