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Old 21st November 2006, 03:31 PM   #1
fosforo is offline fosforo  Italy
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Lightbulb 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
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Old 21st November 2006, 03:54 PM   #2
Did it Himself
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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.
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Old 21st November 2006, 03:59 PM   #3
fosforo is offline fosforo  Italy
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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
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File Type: pdf moogvcf.pdf (78.8 KB, 15 views)
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Old 12th December 2006, 12:57 PM   #4
fanjita is offline fanjita  United Kingdom
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Default Re: Analogue Filter for DJiinG - HELP NEEDED

Quote:
Originally posted by fosforo
Hi to all,

but they seems needing a CV to work.

use a potentiometer as a cv generator?
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Old 13th December 2006, 04:02 AM   #5
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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.
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