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Product information "Doepfer A-121-2 (12dB Multimode Filter)"
The concept of a multimode filter with individual outputs, voltage controllable resonance and a similar name is what this module has in common with the old A-121. But the core is an different one, though, as instead the old CEM3320 circuit the filter known from the desktop synthesizer Dark Energy 2 is used.
frequency range: 10Hz to more than 20kHz
level control at the audio input
two cutoff CV inputs: 1x 1V/octave (FCV1), 1x with attenautor (FCV2)
resonance (Q) is voltage controllable; 1x CV input with attenuator
oscillates at high Q settings
individual outputs for four filter types: low pass, high pass, band pass, notch
HE:
3
TE:
8
Depth:
50
Power consumption +12V:
40
Power consumption -12V:
40
Related links to "Doepfer A-121-2 (12dB Multimode Filter)"
WIth a long trajectory building synths, MIDI keyboards and designing bespoke devices for music pioneers Kraftwerk, Dieter Doepfer decided to design his own modular synthesizer in 1995 based on existing electrical and mechanical specifications of lab equipment he used during his years at university. The official presentation of the system at 1996 Frankfurt Musikmesse caught everyone by surprise and created lots of interest. After Doepfer published the specifications on his website, many instrument designers and engineers saw the potential of the new Eurorack format. Doepfer continues expanding their catalog of over 200 modules (and counting), operating from their modest offices in the outskirts of Munich.
