Blacet Filthy Filtre 2310

We acquired Blacet research in 2019 after the unfortunate passing of its founder, John Blacet. We will continue to make Blacet products available and support the FRAC format. 

Best discussion forum for the frac format: muff's frac forum

Please contact us for PDF documentation after ordering your module or kit. 

“Start with the highly useful, open sounding classic State Variable Filter Design.
Low Pass, Band Pass, High Pass, Notch and All Pass (phase shift) responses all simultaneously available.
Add very agressive Voltage Controlled Q with two "Filthy" settings.
Add Voltage Controlled Mode selection with "switching" or "morphing" transitions.
Add a handy bipolar Modulation Attenuator with switchable destination.”
Finish the design with our high quality, low noise OTAs providing exponential frequency control and linear Q control.”

Sample 0: Basic Low Pass

Sample 1: Extreme Q

Sample 2: Modulation with same VCO, different wave

• 12 dB State Variable design

• Voltage control of frequency and Q

• Two position Q switch: "Filthy: X10, X100"

• +/- CV mod attenuator with switchable destination: Freq or Q

• VC mode select: switch or morph (LP, BP, HP, All Pass)!

• Plus separate mode outs: LP, BP, HP, Notch

While stock lasts, kits will include the original Panasonic pots and Rean knobs. Once these are depleted we will be moving to Alpha pots and Chia Shin knobs. Because the flat d-shaft orientation, the old types and new types are NOT interchangaeable. 

If you use the old knobs on the new pots, or new knobs on the old pots, the pointer direction will be reversed 180 degrees from where John designed it. 

On Demand Info

These kits and assembled modules are offered on demand, click the link to learn more.