Filter Bank

Overview The voltage controlled filter is the subtractive core of the analog synthesizer, shaping the sounds of the oscillators to give a unique sonic signature, giving each synthesizer it’s unique character. I have a soft spot for filters….they are sonically so different and full of character that I can’t stop building new ones and replicating old ones….

Well I started with an ARP 4023 back in 2002 and went on to build many more. Analog filter designs tend toward the sculpting power of the 4-pole LPF, but there are many designs for smoother sounding 2-pole LPF, the single, dual or even 4 pole HPF and the multi-mode SVF. Twelve of my filter designs are housed in a special Euro Rack Filter Bank Cabinet.

Design Details The Filter Bank is built as a standard EuroRack as follows:

The modules are all standard 14HP wide EuroRack.
The panels are 2mm Aluminium with printed text and graphics, manufactured in Germany.
The two 3U 19” racks are manufactured by Rittal
The +/-15V power supply is Oakley Sound with an Oakley Dizzy.
The MDF cabinet is covered in black Tolex.
Control knobs are Rean 15mm.
Pots are all Alpha 16mm rotary.
3mm LED’s are used with LED Lens on some of the modules.

Modules – Top Row