This is a manually controlled bandpass filter module. In addition to the normal controls for frequency and resonance, there is a control for blending the filter's output back in with it's input to give a finer degree of control over the sound. This is combined with a phase reversal switch for the filter's output which allows for notch-like outputs when combined with the blend control.
The board features PC mounted pots for less wiring, and mounting holes for flexibility in panel layout. There are Eurorack and MOTM power connecters.
For complete descriptions of the way the module is used, and how to build it, including schematics and parts list; download this PDF file.
Boards are available now. Price for 1 PCB is $8.
Unfinished eurorack
panels are available for this project, they are 6HP and cost $8 each.
There is
more information here about panels. If you're interested in drilling your own panel for
this project, feel free to use my
drill guide. That image should be printed at 300dpi for proper
scaling.
