Episode 17 MS20 style dual filtering
The good old Korg MS20 has, among other cool tricks, two filters. One high pass and then one low pass. This is a very flexible arrangement that allows for some elaborate filtering. Apart from the obvious responses of high and low, when combined you get band pass filter responses. Depending on the frequency settings of the filters the band pass has different width and since both filters are resonant you get to peaks. Using the various controls on the synthesizer like envelopes and modulators you can change the response of the filter combination in many exciting ways.
In this video I’ve arranged my two Q107 multimode filters in a similar fashion to try to demonstrate at least part of the effect of this very flexible setup. I feed the filters with different wave forms from a single oscillator and control both width and cutoff frequency of the filters. I’ve set it up so a single knob or voltage can control both filters at the same time. This is the most complex patch of these demo series to date.
The Korg MicroKorg plays an arpeggio on the single oscillator for melody purposes, I’m such a crappy keyboard player. To spice things up a bit I put my Moog analog delay pedal on the output but I keep the effect down pretty much so as not to interfere too much with the patch.
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