Doepfer A-121SV Stereo Multimode Filter - Vintage 1u modular Alternate firmware files can be

Alternate firmware files can be written with Pure Data

Introducing Subway

and an additional true stereo AUX for all channels

A Gain knob allows for up to +20dB of boost

536 variations of complex summing algorithms that contain FM

Doepfer A-121SV Stereo Multimode Filter - Vintage 1u modular Alternate firmware files can beModule A 121s is a dual multimode filter which can be used for stereo applications as well as for parallel or serial organized dual mono filters. The core is a 12dB multimode filter identical to the modules A 121 2 and A 121 3. The selection of the filter type is continuously from lowpass via notch and highpass to bandpass. We attached great importance to the usability of the manual controls and CV inputs for both stereo and dual mono applications.