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Sydney, NSW

I've been scouring the net for a diagram, tutorial or schematic on building adjustable knob- or pot-controlled lowpass and highpass filters toincorporate into a current circuit/setup of mine

I've seen schematics on building simple unadjustable circuits, but I'm having some trouble figuring out how to include a potentiometer to control the cutoff frequency of the filter.

What I'm looking at having in the circuit, basically, is an audio input (1/8", 1/4", RCA, whatever goes), have that pass through the filter circuit in which the cutoff frequency is controlled by a potentiometer, then have the filtered audio put out via another audio jack.

I'm not too good with electronic theory - I've never taken any courses or classes, or taught myself much - but I'm pretty decent at building the circuit given a schematic or diagram. Give me something fairly above beginner's work, explain a few bits, and I should be able to pull through.
I have a pretty adept knowledge of how low and highpass filters work too (that's a given, really), so I'm not totally in the dark.

Sorry if I sound like I wanna be spoonfed or anything. I'm just at my wit's end here.

EDIT: This isn't particularly for a console, so having it built-in or purpose built for a particular console isn't my aim or desire.

Last edited by Chainsaw Police (Jul 26, 2011 11:55 am)

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San Francisco

this is related to my interests.

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Tacoma WA

http://www.educypedia.be/electronics/analogfil.htm

this link off there seems pretty cool
http://focus.ti.com/lit/an/sloa093/sloa093.pdf

http://labs.det3.net/diy/synthbook.html

det3 has a lot of links that may help as well

other than this i'm no help.

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Unsubscribe

how about: http://mutable-instruments.net/sidekick

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Czech republic

http://thesquarewaveparade.com/brdlayot.html
http://www.maxim-ic.com/app-notes/index.mvp/id/3077

also: http://www.musicfromouterspace.com/anal … SYNTH.html and it's filter section

Last edited by ashimoke (Jul 27, 2011 5:45 pm)

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portland

There is also one in the book "Handmade electronic music" Which I am building now. I will try and find the schematic online or scan it shortly.

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San Francisco

aaaaaw yeah. you guys are pimp.

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England
greightbit wrote:

There is also one in the book "Handmade electronic music" Which I am building now. I will try and find the schematic online or scan it shortly.

Careful with copyright infringement on here! Just saying.

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Sydney, NSW
wedanced wrote:

aaaaaw yeah. you guys are pimp.

This

Until I get a job an money, I want a simple alternative to a KP's high and lowpass filter options.
So yeah, the stuff you guys have dug up has been extremely helpful! Thanks!

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Whitley Bay, England

Post thread on 8bc - "You'll need over $100 in parts you should just get a Kaoss pad!"

Post thread on CM.org - ACTUAL ANSWERS

This is incredibly useful for me as well, thanks guys.

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Sydney, NSW
TraceKaiser wrote:

Post thread on 8bc - "You'll need over $100 in parts you should just get a Kaoss pad!"

Post thread on CM.org - ACTUAL ANSWERS

Since joining CM, I've kinda noticed 8bc is ful of mostly dumbarses.


TraceKaiser wrote:

This is incredibly useful for me as well, thanks guys.

Sweeeet, now I don't feel selfish and like a newb tongue

Last edited by Chainsaw Police (Jul 29, 2011 12:29 am)

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San Francisco

another rather cheap filter option is the tweakalizer. I have used one for years and it has been great for live use. $54 at some places. its no analog filter but it works well enough.

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Sydney, NSW

Any progress on this? I'm still interested (and I'm sure others are as well tongue)