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Circuitbenders Forum => Circuitbending discussion => DIY Synths => Topic started by: crossedout on April 20, 2010, 11:27:25 PM

Title: Filter circuit schematics?
Post by: crossedout on April 20, 2010, 11:27:25 PM

hey i was wondering if anyone had any schematics to make a filter circuit like the one shown here:

http://www.youtube.com/v/3y-770Bx8WA&hl=en_US&fs=1&rel=0


thanks in advance.

Title: Re: Filter circuit schematics?
Post by: Circuitbenders on April 20, 2010, 11:58:15 PM

sounds like the filter from the MFOS Wierd Sound Generator to me, Theres some information if you do a search on this forum or have a look on the net. Theres plenty of people who have drawn out standalone schematics for it.

Title: Re: Filter circuit schematics?
Post by: theshame on April 22, 2010, 01:17:53 AM

Here's a schematic for that filter (only the stuff on the right side of the dotted line). I have breadboarded it and it works pretty well.

http://www.musicfromouterspace.com/analogsynth/YOUR_FIRST_SYNTH/your_first_synth.gif (http://www.musicfromouterspace.com/analogsynth/YOUR_FIRST_SYNTH/your_first_synth.gif)

Title: Re: Filter circuit schematics?
Post by: crossedout on April 22, 2010, 06:22:44 PM

so if i connected a 1/4 jack to the input, one wire would go to ground and the hot lead would come before R7?

thanks for the schematics!

Title: Re: Filter circuit schematics?
Post by: theshame on April 23, 2010, 02:34:22 AM

You got it. You will likely need to vary R7 depending on the signal you feed it. I think I actually just left it out.