Doepfer

Oh another one I just thought of. I believe the amazing Toppobrillo Sport Modulator can function as a slope detector with gate out. 

Sent from my iPhone

> On Nov 18, 2014, at 9:00 AM, Nathan Cearley nathancearley@gmail.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> it matters what your cv source is.  you may have to change it to a source that has gates out in addition to the cv out (like a sequencer with cv and gate out).  or try and find a random voltage source that has both cv and gate out.  or, get a doepfer quantizer and run the cv source into both the uscale and it but only use the gate out of the doepfer.
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>> On Tue, Nov 18, 2014 at 8:18 AM, David Kellett davidkellettwoulf@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>  
>> 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? ;-)
>>> 
>> 
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