No info about availability.
Quad 12db Multimode Filter
This quad mutimode filter combines 4 independent multi-mode filters with selectable low-pass, band-pass & hi-pass. Each filter can be synced to one another to build to a 48dB low-pass/hi-pass filter or 2 x 24dB band-pass. Each filter has an modulation input and an individual output to create stereo effects a well as quadriphonic textures. The filters A & B and C & D can be used in parallel mode or serial mode
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These merchants probably sell this module. Huh?