This Pedal is currently available.
Type 23 - 3 Band Dynamic Filter Pedal
Not one, not two, but three bands of dynamic filters that sweep your bass tones under the control of the ‘high’, ‘low’ or ‘blended’ filter frequency; generating speech like and funky bass sounds.
The Type 23 is a triple voltage controlled envelope filter with two of the filters being switchable between high band and mid band.
The single sensitivity control effects the amount of which the oscillating filter reacts with the instrument and allows for a large range of Auto-Wah and Envelope effects, letting your inner-funk shine through.
Adding more tonal capabilities, there’s a handy switch on the bottom of the pedal which further varies the frequency of the selected ‘high’, ‘low’ or blended filter oscillation fre- quency ¬– to tailor the nature of the desired effect amount.
USER GUIDE
The T23 pedal is a pure analogue pedal; it consists of a detector circuit that changes the signal from the bass to a control voltage that is then sent to three voltage controlled filters.
This effectively means that the filters are sensitive to your playing style and will respond accordingly with more effect the harder you play.
The sensitivity control has enough range to cope with a variety of basses but occasionally it may be found that with High output type basses the filters may be overloaded due to excessive input. A small slide switch has been incorporat- ed in the base of the pedal to allow the input sensitivity to be reduced to suit instruments with a high output.
This rotary control sets the level of signal passing to the control circuit for the filters and therefore the overall effect, experimentation will be required to get the exact sound you have in mind, consistent playing will be required as the filters are touch sensitive.
https://ashdownmusic.com/products/type-23-3-band-dynamic-filter-pedal