electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
Live streaming at radio.electro-music.com

  host / artist show at your time
  Antimon Antimon Waves
Please visit the chat
 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
How to CV control the Grinder ?
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [5 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
Funky40



Joined: Sep 24, 2005
Posts: 875
Location: Swiss
Audio files: 1
G2 patch files: 5

PostPosted: Fri Jun 19, 2009 11:06 am    Post subject: How to CV control the Grinder ? Reply with quote  Mark this post and the followings unread

Hi,

i like the Grinder very much.
I have built two as little standalone Modules ( one installed) so it is used now very often and i got a good hang to it now.

I really would like to have the Grinder with CV control for both: Drive and Lag.
Question How can i do this ?


I think Vactrols would not be the best choice, the behave depends too much of a kind of a treshold.
Can somebody point me to a cuircuit that could be adapted ? I guess something with OTA or so doesn't it ?

I would try to draw a board if seeing clear concerning the circuitry.
Ken, not interested to draw a schematic or making a own Board ? Grinder is soooo great ! give it CV please Cool
Back to top
View user's profile Send private message
Funky40



Joined: Sep 24, 2005
Posts: 875
Location: Swiss
Audio files: 1
G2 patch files: 5

PostPosted: Mon Jun 22, 2009 1:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

it looks to me as i just could add a VCA between LE and LC, also DE and DC instead of pots.
the two pots seem just to act like a door you can close or keep it open.
Respectivly could i add insertjacks there. gonna make a new panel and test it with insertjacks.
One of my favorite modules this Days Laughing
Back to top
View user's profile Send private message
Fernando



Joined: Dec 30, 2006
Posts: 226
Location: Barcelona & Emporda, Spain

PostPosted: Mon Jul 27, 2009 11:25 am    Post subject: Reply with quote  Mark this post and the followings unread

as suggested by Ken in many of his circuits, mix in a positive DC signal to "animate" the threshold point.
Use a mixer that accept AC and DC signals and use a DC that you like for that duty.
For instance, the output of an envelope follower of some kind (now you could use CGS76, the Serge Slope, wich can be used as a follower too)
The typical example would be a PsychoLFO

I also thought about controlling this little circuit, but I think Ken advise was always to controll it through the sources (amplitude of the audio via VCA to "control" the Drive, a DC signal to "control" the Lag, the timbre of the audio signal, etc.)

edit
OK, now I look at the schematic and my suggestions were more for the Folder, Lockhart, tube VCA and other circuits...
But for the Grinder, an VCA at the lag loop should do something and a vactrol for Lag is something I'd like to try too.
... you could process (VCA or whatever) the signal coming from the lag circuit (before the Drive pot) and reinject it at the Drive pot... (the first op amp in the circuit looks like an inverting mixer that see two signals thru a 100k resistor -input and lagged- If I'm right, you may use an VCA here -or whatever, of course)

all speculations but ... :)
try and report back!
Back to top
View user's profile Send private message
Funky40



Joined: Sep 24, 2005
Posts: 875
Location: Swiss
Audio files: 1
G2 patch files: 5

PostPosted: Thu Jul 30, 2009 12:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

Fernando wrote:

edit
OK, now I look at the schematic and my suggestions were more for the Folder, Lockhart, tube VCA and other circuits...
But for the Grinder, an VCA at the lag loop should do something and a vactrol for Lag is something I'd like to try too.
... you could process (VCA or whatever) the signal coming from the lag circuit (before the Drive pot) and reinject it at the Drive pot... (the first op amp in the circuit looks like an inverting mixer that see two signals thru a 100k resistor -input and lagged- If I'm right, you may use an VCA here -or whatever, of course)

all speculations but ... Smile
try and report back!

Yup

as i read this i have here a Grinder MK-II close to be ready for wiring.
That one will get insertpoints so that i can patch out to a VCA
Back to top
View user's profile Send private message
Fernando



Joined: Dec 30, 2006
Posts: 226
Location: Barcelona & Emporda, Spain

PostPosted: Wed Dec 28, 2016 10:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Did you make any experiments controlling the Grinder?


Funky40 wrote:
Fernando wrote:

edit
OK, now I look at the schematic and my suggestions were more for the Folder, Lockhart, tube VCA and other circuits...
But for the Grinder, an VCA at the lag loop should do something and a vactrol for Lag is something I'd like to try too.
... you could process (VCA or whatever) the signal coming from the lag circuit (before the Drive pot) and reinject it at the Drive pot... (the first op amp in the circuit looks like an inverting mixer that see two signals thru a 100k resistor -input and lagged- If I'm right, you may use an VCA here -or whatever, of course)

all speculations but ... :)
try and report back!

Yup

as i read this i have here a Grinder MK-II close to be ready for wiring.
That one will get insertpoints so that i can patch out to a VCA

_________________
Fer

.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [5 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use