Fixed Resonant Filterbank

From the original Catalog:
” The RESONANT EQUALIZER (EQ) is a unique ten-band filter designed specifically for electronic sound synthesis and processing. Except for the top and bottom frequency bands, all other bands are spaced at an interval of a major seventh. This non-standard spacing avoids the very common effect of an accentuated resonance in one key, as will be the effect from graphic equalizers with octave or third-octave spacing between bands. spacing by octaves will reinforce a regular overtone structure for one musical key, thereby producing regularly spaced formants accenting a particular tonality. The Resonant Equalizer’s band spacing are much more interesting, producing formant peaks and valleys that are similar to those in acoustic instrument sounds.
There are three equalized outputs, two which mix the alternate filter bands, and one which is a mix of all filter bands. The upper (^ COMB) lets pass the outputs of frequency bands at 61Hz, 218Hz, 777Hz, 2.8Khz, and 11 Khz. The lower Comb mixes the other bands (29, 114, 411, 1.5K, 5.2K)
This equalizer is different from other equalizers in that the bands can be set to be resonant. When the knobs are in the middle position, the response at the main EQ Output is flat. When the knobs are positioned between 9 and 3 o’clock position, up to 12db of boost or cut is set at the band. If the knob is set beyond the 3 o’clock position, the band will become resonant, simulating the natural resonance of acoustic instrument formant structures. Below the 9 o’clock position, increased band rejection is achieved. “

** 4U Modular is a term used for the format most commonly known as “Serge Format” or “Loudest Warning Format”. Out of respect for the ever growing format, 4U Modular is the easiest way to refer to it. More Specifically it refers to the panel height and mounting hole style. 4U Modular will patch up just fine with other 4U "Serge" formats such as "Random Source", but it will not mount in RS boats or Buchla Boats (or power off Buchla power for that matter). An info page about this will be added to the website soon to make this a lot more easy to understand.

Details:
LGE202 Main PCB Bill of Materials
LGE202 Main PCB Schematic
LGE202 Main PCB Designators
LGE202 Main PCB v1.2 Designators (no major changes)
LGE202 Main PCB Designators w/ Feedback Points
LGE202 I/O PCB Bill of Materials
LGE202C I/O PCB Schematic (wiring diagram)
LGE202C I/O PCB Schematic (Switch Version wiring diagram)
LGE202C I/O PCB Designators Top
LGE202C I/O PCB Designators Bottom

• PCB Size: 6” x 2”

• Current Draw: TBD