[. . . ] [. . . ] The heart of the 19" (1U) unit is the VCF with high-pass, bandpass, low-pass and notch modes and an attenuation slope of 12 dB which can be manipulated in many different ways. Envelope and LFO, but also MIDI data such as velocity, note value or modulation wheel can be used to manipulate the filter frequency. The envelope can be triggered via an analog input, the LFO can be synchronized to the MIDI clock -- nothing is impossible. Any changes to the 10 control knobs and 5 buttons on the front panel are output via MIDI and recorded via the sequencer. [. . . ] [. . . ]