ok, so the planned doepfer module covers both florian's ideas, ok
 


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--- On Wed, 10/29/08, yahoo@... < yahoo@... > wrote:

From: yahoo@... < yahoo@... >
Subject: AW: 1 Frequency-to DV-Converter. Was: bright new ideas for future Doepfer A100 modules!
To: Doepfer_a100@yahoogroups.com
Date: Wednesday, October 29, 2008, 11:46 AM






> -----Ursprüngliche Nachricht--- --
> Von: Doepfer_a100@ yahoogroups. com
> [mailto:Doepfer_a100@ yahoogroups. com]Im Auftrag von Florian Anwander
> Gesendet: Dienstag, 28. Oktober 2008 18:01
> An: Doepfer_a100@ yahoogroups. com
> Betreff: Re: 1 Frequency-to DV-Converter. Was: bright new
> ideas for future Doepfer A100 modules!
>
>
> Don Kim schrieb:
> > I would love to see some sort of OSC to CV converter.
> Let me jump in here.
>
> We do have this already: the PLL A196 is a frequency to CV converter.
> The low pass out is the CV-out. But I think the A196 is a too rough /
> too hardcore implementation of the standard CD4046 PLL chip and not
> really usable for Fq2CV.
>
>
> So we want something better. But then we have to decide for which task
> it is intended because there are different approaches how to achieve a
> fq2cv conversion.
>
> I could imagine a clock-to-CV converter which does not have to be the
> fastest, but should be finally quite exact. Typical example it could be
> used to make the BBD-modules controlled by the tempo, or LFOs in syc
> with the tempo. These can follow the incoming frequency over several
> ocataves. But they have to rely on a dedicated waveform of the incoming
> signal (best: rectangle).
>
> The other usage might be an instrument to CV voncerter, like in the Korg
> MS-03 or the Roland SPV-355; These were intended to follow a melody
> quite fast, and did not have to be very exact - and they only had a
> usable range of around one and a half octaves. If outside you had to
> adjust them again. These can handle all kinds of (monophonic) signals
> and are not very dependant on the waveform.
>
> I think those are two different (possible) modules.
>
> Florian

We are still working on such a module (A-195-1). The module will be probably
equipped with both a circuit that derives (or better: tries to derive) a
clean rectangle from the incoming monophonic audio signal and a circuit that
generates a voltage that corresponds to the frequency of this rectangle
signal (this is the easier part of the project). The internal rectangle
could be fed to the switching contact of a jack socket so that even an
external rectangle can be used to generate the frequency voltage. We could
add kind of a range switch to select between audio/clock frequencies and
several averaging modes (i.e. how many periodes of the rectangle are used to
generate the frequency voltage). But so far we have no release date for this
module.

Best wishes
Dieter Doepfer


















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