Analogue Filter for DJiinG - HELP NEEDED

fosforo · 21st November 2006, 02:31 PM

Hi to all,

i would like to build an analogue filter (resonance,cutoff,hp/lp) to use with my DJ setup.
The idea is to feed a CDJ into the filter and then the filter to the mixer.
I've searched around the web and came out some projects related to analogue synths (VCF) but they seems needing a CV to work.
So, i was wondering if someone could help me finding out a project or some idea to do that.
Any Idea will be very appreciated.

Many Thankx

Fabio

richie00boy · 21st November 2006, 02:54 PM

You would have to discount the Sallen-Key filter as it would require a potentiometer with more than 2 gangs for stereo, which makes it hard to find and expensive.

Maybe multiple-feedback filter is suitable, I don't know you will have to research that yourself.

Otherwise a voltage-controlled filter chip is the only other realistic option.

fosforo · 21st November 2006, 02:59 PM

Quote:

Originally posted by richie00boy
You would have to discount the Sallen-Key filter as it would require a potentiometer with more than 2 gangs for stereo, which makes it hard to find and expensive.

Maybe multiple-feedback filter is suitable, I don't know you will have to research that yourself.

Otherwise a voltage-controlled filter chip is the only other realistic option.

I found this one.
It's a copy of the original moog filter.
What i have to understand is how i can use it...
http://www.meadowfield.freeuk.com/synth/mini.html

fanjita · 12th December 2006, 11:57 AM

Quote:

Originally posted by fosforo
Hi to all,

but they seems needing a CV to work.

use a potentiometer as a cv generator?

neutron7 · 13th December 2006, 03:02 AM

if you find an analog filter that requires a CV to work, then just make a pot provide the CV to the filter. it requires no extra components, and voltage control filter designed for synths should work great for you. you can even use a VC pedal which is a big foot pedal like a "wah wah" connected to a pot. it will give you a control voltage for the filter.

21st November 2006, 02:31 PM	#1
fosforo diyAudio Member Join Date: Jun 2006	Analogue Filter for DJiinG - HELP NEEDED Hi to all, i would like to build an analogue filter (resonance,cutoff,hp/lp) to use with my DJ setup. The idea is to feed a CDJ into the filter and then the filter to the mixer. I've searched around the web and came out some projects related to analogue synths (VCF) but they seems needing a CV to work. So, i was wondering if someone could help me finding out a project or some idea to do that. Any Idea will be very appreciated. Many Thankx Fabio

21st November 2006, 02:54 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	You would have to discount the Sallen-Key filter as it would require a potentiometer with more than 2 gangs for stereo, which makes it hard to find and expensive. Maybe multiple-feedback filter is suitable, I don't know you will have to research that yourself. Otherwise a voltage-controlled filter chip is the only other realistic option. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Sime filter calculation help needed.	Nordic	Parts	20	15th November 2006 02:42 PM
Is Lowpass filter needed in 6ch amp?	Wynand	Chip Amps	4	24th November 2005 04:34 PM
Filter expert needed...	Luke123	Solid State	11	14th April 2005 03:56 PM
Help needed for active filter	k1jroth	Chip Amps	0	23rd February 2005 03:14 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th December 2006, 03:02 AM	#5
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	if you find an analog filter that requires a CV to work, then just make a pot provide the CV to the filter. it requires no extra components, and voltage control filter designed for synths should work great for you. you can even use a VC pedal which is a big foot pedal like a "wah wah" connected to a pot. it will give you a control voltage for the filter.