electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
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 
 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Question about Four pole low pass VCF (24dB/Oct)
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [4 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
Parsa



Joined: Apr 13, 2007
Posts: 26
Location: Escondido, CA

PostPosted: Mon Apr 23, 2007 2:28 pm    Post subject: Question about Four pole low pass VCF (24dB/Oct)
Subject description: What are the FM additions?
Reply with quote  Mark this post and the followings unread

I noticed that there is a photo of a the Four Pole Low Pass VCF on the MFOS page:
VCF Four Pole 24dB/Oct With VC Resonance
However, this was built by Thomas White and shows two FM pots and two FM jacks. These are not on the PCB or circuit drawings. Is this a known mod, an older version, or what? What do these do in terms of the frequency?

Posted Image, might have been reduced in size. Click Image to view fullscreen. <---- Click for larger image

Parsa[/url]
Back to top
View user's profile Send private message
funkyfarm



Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3

PostPosted: Mon Apr 30, 2007 8:29 am    Post subject: Reply with quote  Mark this post and the followings unread

For me, FM inputs are for "cv1, cv2" or even "cv3", which are onboard...

FM means that...it modulates the frequency of the filter, no ?
This is what a LFO waveform does, when plugged into cv 1 or cv2 input...

Sometimes FM refers to controlling a parameter (cutt off frequency)
with audio signals instead of control voltages...


(and the last Wink ) ...
Back to top
View user's profile Send private message
Pehr



Joined: Aug 14, 2005
Posts: 1307
Location: Björkvik, Sweden
Audio files: 2

PostPosted: Mon Apr 30, 2007 8:33 am    Post subject: Re: Question about Four pole low pass VCF (24dB/Oct)
Subject description: What are the FM additions?
Reply with quote  Mark this post and the followings unread

Parsa wrote:
I noticed that there is a photo of a the Four Pole Low Pass VCF on the MFOS page:
VCF Four Pole 24dB/Oct With VC Resonance
However, this was built by Thomas White and shows two FM pots and two FM jacks. These are not on the PCB or circuit drawings. Is this a known mod, an older version, or what? What do these do in terms of the frequency?

Parsa[/url]

Those pots are prob just attenuators (or voltage dividers) for the CV... http://www.musicfromouterspace.com/analogsynth/oddsandends.html#POTDIVIDER

_________________
YouTube channel
flickr photostream
http://loxodrom.blogspot.com
http://www.garageband.com/artist/loxodrom
http://soundcloud.com/loxodrom
Back to top
View user's profile Send private message
funkyfarm



Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3

PostPosted: Mon Apr 30, 2007 8:45 am    Post subject: Reply with quote  Mark this post and the followings unread

Yep !

This IS an answer !

for sure mine was a little bit obscured and contains way too more "..."

Very Happy
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [4 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 » MusicFromOuterSpace.com designs by Ray Wilson
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


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