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Thread
2008-04-04 by Stu Grimshaw
hi group, i was wondering if it's possible to build a simple (passive?) slew limiter with a view to rounding off a gate signal enough to reduce/remove the clicks produced by controlling vca's with gate signals. i googled, but came up with a ton of stuuff that's a bit more than i need. i need no voltage control, indeed not even a variable slew rate. any ideas? thanks, stu
2008-04-04 by hardware@doepfer.de
> hi group, > > i was wondering if it's possible to build a simple (passive?) slew > limiter with a view to rounding off a gate signal enough to > reduce/remove the clicks produced by controlling vca's with gate signals. > > i googled, but came up with a ton of stuuff that's a bit more than i > need. > > i need no voltage control, indeed not even a variable slew rate. > > any ideas? > > thanks, > > stu The simple low pass on the DIY page should do the job. The values for R1 and C1 depend upon the desired slew rate which is ~ R1*C1. With 1uF and 10k you obtain ~ 10 ms slew rate. The upper half of the A-170 uses this circuit (with R1 as a combination of a fixed resistor and a potentiometer) followed by a buffer amplifier to avoid voltage losses caused by the load connected to the R/C combination. But for simple Gate/VCA control a small voltage loss should not be a problem. Best wishes Dieter Doepfer
2008-04-05 by Jordi Sampe Farre
Hello, please, can you tell me what I can do it for no recieve more mail form Doepfer group? Thanks and best from Barcelona To: Doepfer_a100@yahoogroups.com
From: hardware@doepfer.de
Date: Fri, 4 Apr 2008 17:11:59 +0200
Subject: AW: [Doepfer_a100] simple fixed slew limiter?
> hi group,
>
> i was wondering if it's possible to build a simple (passive?) slew
> limiter with a view to rounding off a gate signal enough to
> reduce/remove the clicks produced by controlling vca's with gate signals.
>
> i googled, but came up with a ton of stuuff that's a bit more than i
> need.
>
> i need no voltage control, indeed not even a variable slew rate.
>
> any ideas?
>
> thanks,
>
> stu
The simple low pass on the DIY page should do the job. The values for R1 and
C1 depend upon the desired slew rate which is ~ R1*C1. With 1uF and 10k you
obtain ~ 10 ms slew rate. The upper half of the A-170 uses this circuit
(with R1 as a combination of a fixed resistor and a potentiometer) followed
by a buffer amplifier to avoid voltage losses caused by the load connected
to the R/C combination. But for simple Gate/VCA control a small voltage loss
should not be a problem.
Best wishes
Dieter Doepfer
_________________________________________________________________
Tecnolog�a, moda, motor, viajes,�suscr�bete a nuestros boletines para estar siempre a la �ltima
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[Non-text portions of this message have been removed]2008-04-05 by Bakis Sirros
hello,
go to 'edit membership', in the group's home page, and
change the message delivery to 'web only'
--- Jordi Sampe Farre <gd_records@hotmail.com> wrote:
> Hello, please, can you tell me what I can do it for
> no recieve more mail form Doepfer group? Thanks and
> best from Barcelona
>
>
>
> To: Doepfer_a100@yahoogroups.com
> From: hardware@doepfer.de
> Date: Fri, 4 Apr 2008 17:11:59 +0200
> Subject: AW: [Doepfer_a100] simple fixed slew
> limiter?
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> > hi group,
>
> >
>
> > i was wondering if it's possible to build a simple
> (passive?) slew
>
> > limiter with a view to rounding off a gate signal
> enough to
>
> > reduce/remove the clicks produced by controlling
> vca's with gate signals.
>
> >
>
> > i googled, but came up with a ton of stuuff that's
> a bit more than i
>
> > need.
>
> >
>
> > i need no voltage control, indeed not even a
> variable slew rate.
>
> >
>
> > any ideas?
>
> >
>
> > thanks,
>
> >
>
> > stu
>
>
>
> The simple low pass on the DIY page should do the
> job. The values for R1 and
>
> C1 depend upon the desired slew rate which is ~
> R1*C1. With 1uF and 10k you
>
> obtain ~ 10 ms slew rate. The upper half of the
> A-170 uses this circuit
>
> (with R1 as a combination of a fixed resistor and a
> potentiometer) followed
>
> by a buffer amplifier to avoid voltage losses caused
> by the load connected
>
> to the R/C combination. But for simple Gate/VCA
> control a small voltage loss
>
> should not be a problem.
>
>
>
> Best wishes
>
> Dieter Doepfer
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
_________________________________________________________________
> Tecnología, moda, motor, viajes,
suscríbete a
> nuestros boletines para estar siempre a la última
>
http://newsletters.msn.com/hm/maintenanceeses.asp?L=ES&C=ES&P=WCMaintenance&Brand=WL&RU=http%3a%2f%2fmail.live.com
>
> [Non-text portions of this message have been
> removed]
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
[Doepfer_a100] group owner
http://www.parallel-worlds-music.com
http://www.myspace.com/parallelworldsmusic
http://www.myspace.com/interconnectedmusic
http://www.myspace.com/memorygeist
http://www.DiN.org.uk
http://www.musicamaximamagnetica.com
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Athens-Greece
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http://tc.deals.yahoo.com/tc/blockbuster/text5.com2008-04-05 by Sandy Brain
go to the yahoo groups homepage, log in and go to the doepfer group page. there's an option to leave the group there. hth
On 5 Apr 2008, at 10:31, Jordi Sampe Farre wrote: > Hello, please, can you tell me what I can do it for no recieve more > mail form Doepfer group? Thanks and best from Barcelona > > > > To: Doepfer_a100@yahoogroups.com > From: hardware@doepfer.de > Date: Fri, 4 Apr 2008 17:11:59 +0200 > Subject: AW: [Doepfer_a100] simple fixed slew limiter? > > > > > > > > > > > > > > > > > > > > >> hi group, > >> > >> i was wondering if it's possible to build a simple (passive?) slew > >> limiter with a view to rounding off a gate signal enough to > >> reduce/remove the clicks produced by controlling vca's with gate >> signals. > >> > >> i googled, but came up with a ton of stuuff that's a bit more than i > >> need. > >> > >> i need no voltage control, indeed not even a variable slew rate. > >> > >> any ideas? > >> > >> thanks, > >> > >> stu > > > > The simple low pass on the DIY page should do the job. The values > for R1 and > > C1 depend upon the desired slew rate which is ~ R1*C1. With 1uF and > 10k you > > obtain ~ 10 ms slew rate. The upper half of the A-170 uses this > circuit > > (with R1 as a combination of a fixed resistor and a potentiometer) > followed > > by a buffer amplifier to avoid voltage losses caused by the load > connected > > to the R/C combination. But for simple Gate/VCA control a small > voltage loss > > should not be a problem. > > > > Best wishes > > Dieter Doepfer > > > > > > > > > > > > > > > > > > > > > > > > > _________________________________________________________________ > Tecnología, moda, motor, viajes, > suscríbete a nuestros boletines para estar siempre a la última > http://newsletters.msn.com/hm/maintenanceeses.asp? > L=ES&C=ES&P=WCMaintenance&Brand=WL&RU=http%3a%2f%2fmail.live.com > > [Non-text portions of this message have been removed] > > > ------------------------------------ > > Yahoo! Groups Links > > >
2008-04-05 by Florian Anwander
Hi, or simply do what is written in every footer of these mails: Florian Jordi Sampe Farre wrote:
> Hello, please, can you tell me what I can do it for no recieve more mail form Doepfer group? Thanks and best from Barcelona > > > > To: Doepfer_a100@yahoogroups.com > From: hardware@doepfer.de > Date: Fri, 4 Apr 2008 17:11:59 +0200 > Subject: AW: [Doepfer_a100] simple fixed slew limiter? > > > > > > > > > > > > > > > > > > > > > > hi group, > > > >>i was wondering if it's possible to build a simple (passive?) slew > > >>limiter with a view to rounding off a gate signal enough to > > >>reduce/remove the clicks produced by controlling vca's with gate signals. > > > >>i googled, but came up with a ton of stuuff that's a bit more than i > > >>need. > > > >>i need no voltage control, indeed not even a variable slew rate. > > > >>any ideas? > > > >>thanks, > > > >>stu > > > > > The simple low pass on the DIY page should do the job. The values for R1 and > > C1 depend upon the desired slew rate which is ~ R1*C1. With 1uF and 10k you > > obtain ~ 10 ms slew rate. The upper half of the A-170 uses this circuit > > (with R1 as a combination of a fixed resistor and a potentiometer) followed > > by a buffer amplifier to avoid voltage losses caused by the load connected > > to the R/C combination. But for simple Gate/VCA control a small voltage loss > > should not be a problem. > > > > Best wishes > > Dieter Doepfer > > > > > > > > > > > > > > > > > > > > > > > > > _________________________________________________________________ > Tecnología, moda, motor, viajes,…suscríbete a nuestros boletines para estar siempre a la última > http://newsletters.msn.com/hm/maintenanceeses.asp?L=ES&C=ES&P=WCMaintenance&Brand=WL&RU=http%3a%2f%2fmail.live.com > > [Non-text portions of this message have been removed] > > > ------------------------------------ > > Yahoo! Groups Links > > > >
2008-04-09 by Stu Grimshaw
thanks dieter, works a treat. 20ms seems to be a good value. stu