This Module is discontinued.
12dB Multimode Filter
Module A-121 is a voltage-controlled multi-mode filter with a cut-off slope of -12 dB / octave.
Four simultaneous outputs are available, each with different characteristics: low-pass, band-pass, high-pass and notch (or band reject).
The cut-off frequency determines the point at which the respective filter effects appear. The frequency can be adjusted manually, or by voltage control (Filter modulation, for instance by an LFO or ADSR). Two CV inputs are available, whose control voltages are summed.
Resonance (Emphasis or Q ) can be adjusted manually, or by voltage control (voltage-controlled resonance / VCQ), right up to self-oscillation, in which case it will behave like a sine wave oscillator.
For more detailed information please look at the English user's manual
As the special circuit CEM3320 used in this module is no longer available the module has to be discontinued. Sale while stocks last !
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