The Resonant Equaliser (EQ) is a unique ten-band filter designed specifically for electronic sound synthesis and processing. Except for the top and bottom frequency bands, the bands are spaced at an interval of a major seventh. The Resonant Equaliser is designed to produce formant peaks and valleys similar to those in acoustic instruments.
There are three equalised outputs: the two COMB outputs provide the sums of the two alternate filter bands, and the two top outputs are the (identical) mix of all filter bands.
Note that there is no sharp separation between the bands, moving any frequency knob will have an influence on both COMB outputs. This equaliser is special because 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 the 9 and 3 o’clock position, up to 12 db 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.
The Random*Source version of the filter is a licensed and authorised adaptation of the legendary Serge equaliser. It adds an input mixer with 2 inputs that can be built/used to attenuate or amplify/distort the input signal(s) before they are sent into the EQ and a Feedback section (knob and phase switch) which allows to feed back the output signal or the inverted output signal (depending on the Phase switch). Adding inverted feedback leads to phase cancellation effects - unlike the “normal” feedback, level decreases and the signal thins out.
Video: https://youtu.be/uLw6gdQwZf0
Product Specs
- Item Number: 34268
- Make: Serge Modular
- Model: Resonant EQ (ResEQ) - Silver
- Condition: Brand New
- Finish: Silver
- Categories: keyboards-and-synths ⇒ eurorack
- Function: Equalizer
- Made In: Germany
- MPN: SM-ResEQ
- Modular Grid: Eurorack ⓘ ＋
- Dimensions*: 16 HP 38 mm deep
- Power*: 100 mA +12V 100 mA -12V ? mA 5V
* User contributed details