Doepfer

> Registered No: 3296375
> Registered in England and Wales
> 
> 
> 
> [Non-text portions of this message have been removed]
>

From: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
On Behalf Of Adam-V
Sent: 12 March 2008 00:08
To: Doepfer_a100@yahoogroups.com
Subject: [Doepfer_a100] Re: Adding a CV jack and attenuator to an
existing variable function?



Hi David,

Sounds to me like this could be the ideal job for a vactrol. You would
use the vactrol in place of the pot. Unfortunately I can't help with
any circuit details but I reckon there will be plenty of vactrol
circuits floating around the net.

Cheers,
Adam-V
--- In Doepfer_a100@yahoogroups.com
<mailto:Doepfer_a100%40yahoogroups.com> , David Salter
<david.salter@...>
wrote:
>
> 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
> 
> David Salter
> Senior Consultant
> PSG 
> 
> Reuters Messaging: david.salter.reuters.com@...
> (t) +44 (0)20 7542 2402 | (m) 07990562402 | (f) 52699 
> 
> Get the latest news at Reuters.com <http://www.reuters.com/
<http://www.reuters.com/> > 
> 
> 
> 
> 
> This email was sent to you by Reuters, the global news and
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> To find out more about Reuters visit www.about.reuters.com
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> except where the sender specifically states them to be the views of
Reuters Limited.
> 
> Reuters Limited is part of the Reuters Group of companies, of which
Reuters Group PLC is the ultimate parent company.
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South Colonnade, Canary Wharf, London E14 5EP, United Kingdom
> Registered No: 3296375
> Registered in England and Wales
> 
> 
> 
> [Non-text portions of this message have been removed]
>



 


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From: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
On Behalf Of Anthony Rolando
Sent: 12 March 2008 12:13
To: doepfer_a100@yahoogroups.com
Subject: RE: [Doepfer_a100] Re: Adding a CV jack and attenuator to an
existing variable function?




Voltage Controlled Resistor using the LM13700. CHeck out that chip's
Data Sheet from National for details.

Tony

> To: Doepfer_a100@yahoogroups.com
<mailto:Doepfer_a100%40yahoogroups.com> 
> From: david.salter@reuters.com <mailto:david.salter%40reuters.com> 
> Date: Wed, 12 Mar 2008 07:54:46 +0000
> Subject: RE: [Doepfer_a100] Re: Adding a CV jack and attenuator to an
existing variable function?
> 
> Good idea Adam, 
> 
> I'll have a look around. Thanks
> 
> david
> 
> David Salter
> Senior Consultant
> PSG 
> 
> Reuters Messaging: david.salter.reuters.com@reuters.net
<mailto:david.salter.reuters.com%40reuters.net> 
> (t) +44 (0)20 7542 2402 | (m) 07990562402 | (f) 52699 
> 
> Get the latest news at Reuters.com <http://www.reuters.com/
<http://www.reuters.com/> > 
> 
> 
> 
> ________________________________
> 
> From: Doepfer_a100@yahoogroups.com
<mailto:Doepfer_a100%40yahoogroups.com>
[mailto:Doepfer_a100@yahoogroups.com
<mailto:Doepfer_a100%40yahoogroups.com> ]
> On Behalf Of Adam-V
> Sent: 12 March 2008 00:08
> To: Doepfer_a100@yahoogroups.com
<mailto:Doepfer_a100%40yahoogroups.com> 
> Subject: [Doepfer_a100] Re: Adding a CV jack and attenuator to an
> existing variable function?
> 
> 
> 
> Hi David,
> 
> Sounds to me like this could be the ideal job for a vactrol. You would
> use the vactrol in place of the pot. Unfortunately I can't help with
> any circuit details but I reckon there will be plenty of vactrol
> circuits floating around the net.
> 
> Cheers,
> Adam-V
> --- In Doepfer_a100@yahoogroups.com
<mailto:Doepfer_a100%40yahoogroups.com> 
> <mailto:Doepfer_a100%40yahoogroups.com> , David Salter
> <david.salter@...>
> wrote:
> >
> > 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
> > 
> > David Salter
> > Senior Consultant
> > PSG 
> > 
> > Reuters Messaging: david.salter.reuters.com@...
> > (t) +44 (0)20 7542 2402 | (m) 07990562402 | (f) 52699 
> > 
> > Get the latest news at Reuters.com <http://www.reuters.com/
<http://www.reuters.com/> 
> <http://www.reuters.com/ <http://www.reuters.com/> > > 
> > 
> > 
> > 
> > 
> > This email was sent to you by Reuters, the global news and
> information company. 
> > To find out more about Reuters visit www.about.reuters.com
> > 
> > Any views expressed in this message are those of the individual
> sender, 
> > except where the sender specifically states them to be the views of
> Reuters Limited.
> > 
> > Reuters Limited is part of the Reuters Group of companies, of which
> Reuters Group PLC is the ultimate parent company.
> > Reuters Group PLC - Registered office address: The Reuters Building,
> South Colonnade, Canary Wharf, London E14 5EP, United Kingdom
> > Registered No: 3296375
> > Registered in England and Wales
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
> 
> 
> 
> 
> 
> 
> This email was sent to you by Reuters, the global news and information
company. 
> To find out more about Reuters visit www.about.reuters.com
> 
> Any views expressed in this message are those of the individual
sender, 
> except where the sender specifically states them to be the views of
Reuters Limited.
> 
> Reuters Limited is part of the Reuters Group of companies, of which
Reuters Group PLC is the ultimate parent company.
> Reuters Group PLC - Registered office address: The Reuters Building,
South Colonnade, Canary Wharf, London E14 5EP, United Kingdom
> Registered No: 3296375
> Registered in England and Wales
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 

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This email was sent to you by Reuters, the global news and information company. 
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except where the sender specifically states them to be the views of Reuters Limited.

Reuters Limited is part of the Reuters Group of companies, of which Reuters Group PLC is the ultimate parent company.
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Registered No: 3296375
Registered in England and Wales



[Non-text portions of this message have been removed]

From: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
On Behalf Of hardware@doepfer.de
Sent: 17 March 2008 09:50
To: Doepfer_a100@yahoogroups.com
Subject: AW: [Doepfer_a100] 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: [Doepfer_a100] 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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Any views expressed in this message are those of the individual sender, 
except where the sender specifically states them to be the views of Reuters Limited.

Reuters Limited is part of the Reuters Group of companies, of which Reuters Group PLC is the ultimate parent company.
Reuters Group PLC - Registered office address: The Reuters Building, South Colonnade, Canary Wharf, London E14 5EP, United Kingdom
Registered No: 3296375
Registered in England and Wales



[Non-text portions of this message have been removed]