Thanks Dieter,

I'd be interested in Christian's findings - especially as some of the
parameters change in a stepped log way.

Best wishes

David

David Salter
Senior Consultant
PSG

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________________________________

From: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ]
On Behalf Of hardware@...
Sent: 17 March 2008 09:50
To: Doepfer_a100@yahoogroups.com
Subject: AW: 1 Adding a CV jack and attenuator to an
existing variable function

> -----Ursprungliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com

<mailto:Doepfer_a100%40yahoogroups.com>

> [mailto: Doepfer_a100@yahoogroups.com

<mailto:Doepfer_a100%40yahoogroups.com> ]Im Auftrag von David Salter

> Gesendet: Dienstag, 11. Marz 2008 18:07
> An: Doepfer_a100@yahoogroups.com

<mailto:Doepfer_a100%40yahoogroups.com>

> Betreff: 1 Adding a CV jack and attenuator to an existing
> variable function
>
>
> In my quest to get some more effects into my modular - this will

mostly

> sit mid patch not just at the end - I was wondering if anyone can help
> me.
>
> I have been looking at the ACE 16V effects chip, supplied by Cliff in
> the UK. This is a simple device with 16 effect algorithms; 6 fixed
> reverbs and 10 effects covering reverb, delay, chorus and flange with

a

> single variation adjusted by a pot. Ideally if I build this I would

like

> the variation to be under CV control.
>
> The variation varies from effect to effect some acting in a linear
> fashion and some with 100 log steps so I appreciate that a CV would
> cause jumps on some of these functions but I'm willing to try it and

see

> what it sounds like.
>
> However I'm not sure how to add the CV to it. any simple suggestions

it

> would be nice to have a depth attenuator as well as a CV socket.
>
> many thanks
>
> David

We have several DSP effect boards in the company to try out the
usability
within the A-100. Even the ACE 16V is among these units. Christian is
about
to "torture" the boards to find out how they behave under analog
control. We
found that many of these boards are useless for analog control because
of
the artefacts or mutes caused during the alteration of parameters. I'll
have
to ask him how the ACE 16V behaves. The analog control is simple: you
have
to generate a voltage in the range ~ +0.1 to + 3.9 V and connect the
voltage
to pin 12 of the ACE 16V. You have to pay attention that the voltage
applied
to the pin 12 does not become negative or go beyond +5V. Otherwise the
ACE
16V will be destroyed! A suitable protection circuit has to be added as
the
voltages coming from A-100 modules are not limited to this voltage
range.

Best wishes
Dieter Doepfer






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