Doepfer

Yes a voltage control slew would be part of it - but the voltage control for the slew would be based on how fast the pitch changes. So imagine a Theremin - it's output goes to a quantiser which quantises to steps but the rate of change - a slide generated by the VC Slew acting on the quantised pitches - is dependent on how fast you move your hand from one (approximate) note position to another. So I move my hand fast, very little slew, I move my hand slow a longer slew. 

The generating gates is a separate issue for me. I would like to generate a gate signal when there is a step in a CV. So notes coming out of a quantiser produce a gate when there is a new note value. The A156 does this by itself but the uScale does not. The reason I'm using uScale(s) is the freedom of note selection - for instance a cluster from F to Bflat inclusive are "on" but notes B to E are off. With a random voltage source A149 the probability is you get more Fs and Bflats than the notes bounded by them as all B to E are quantised to F or Bflat but only the actual accurate notes in between are heard as themselves. Or pentatonic scales, or Kokin Joshi Scale (I have flutes in these odd scales!!) 

I could put an A156 after the uScale to get the gates but wondered if there was another way. But I'm still not quite clear how I would create a CV based on the rate of change of another CV

David


www.movingisliving.co.uk

Sent from my iPhone 

> On 18 Nov 2014, at 15:17, Nicholas Keller maq163x2@gmail.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Based on your description in this "clarifier", would a VC slew work?  Like the A-171?
> 
> Otherwise, and after reading the other messages in this thread, I still don't understand what you're trying to do. I thought perhaps Florian had seen through your description and realized you want a F->V convertor, but in your initial post you said you wanted a CV based on a CV.  Maybe it is not clear as you did not specify whether the first CV is stepped or smooth
> 
> Nick
> 
> Sent from the future
> 
>> On Nov 18, 2014, at 4:07 AM, "David Kellett davidkellettwoulf@yahoo.com [Doepfer_a100]" <Doepfer_a100@yahoogroups.com> wrote:
>> 
>>  
>> I bought the uScale rather than the A156 because of its flexibility interns of scales and non scales from chromatic notes - so don't really want an A156.
>> 
>> The CV could be - for instance a Theremin where the cv goes out to a quantiser then through a slew / Portamento then to oscillator. The rate of change of the theremin output would control the rate of slew. Hope that makes sense. 
>> 
>> David
>> 
>> www.movingisliving.co.uk
>> 
>> Sent from my iPhone 
>> 
>>> On 18 Nov 2014, at 08:07, Neil Kagan blinkenlicht@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>> 
>>>  
>>> The closest to the second but would be the A-156 as when it quantizes it outputs a trigger. 
>>> 
>>> I'm not sure about the first part; what is causing the changing rate of the cv? 
>>> 
>>> Sent from my iPhone
>>> 
>>>> On 18 Nov 2014, at 07:38, David Kellett davidkellettwoulf@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>>> 
>>>>  
>>>> 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
>>>> 
>>>> www.movingisliving.co.uk
>>>> 
>>>> Sent from my iPhone
>>>> 
> 
>