Morgasmatron! I splurged and got myself this killer filter (as you may have seen in some other videos recently). I think the signal flow in this module is very well thought out. Besides having two great sounding filters in one module, it has this neat little crossfader/mixing section complete with bypass switches for each channel and a phase invert switch for filter B. It may not look like much, but that little bit adds a lot of functionality.
In this patch I set Morgasmatron up as a full oscillator/filter/VCA synth voice. Filter A is the natural choice as oscillator, since it has the switchable extra distortion that turns the self-oscillation sine wave into a square-ish, harmonically rich wave. Additionally, the filters can be routed in series with the centre switch, feeding filter A into filter B without using any patch cords.
The outputs from each filter are available at the Mix output, which is controlled by the crossfader. However, I've switched the A side to Dry (i.e. bypassed the filter) which means there's no sound when the crossfader is all the way counter-clockwise. This only affects the Mix output, though, so there's still sound going from filter A into filter B. By voltage controlling the crossfader, we essentially have a VCA for the output! This also frees up the regular filter B output, which I have patched back into its bipolar modulation input (FM2) so I can add some extra bite to the tone by turning up the modulation amount.
The pitch sequence is generated by using an old trick: combining timed gates/pulses with a mixer. I have enabled a setting on the DLD that changes the clock outputs from short momentary triggers to 50% duty cycle gates. I'm combining the gate outputs from clock A and B with Maths' channels 2 and 3. The levels set on the mixer determine the voltage of the individual steps (and, of course, the sum of these as well). This sequence is sent to Morgasmatron's filter A V/Oct input.
Maths' OR output provides a good rhythmical trigger for the notes. I'm triggering Maths' channel 4 with this, and using that envelope to control both the filter cutoff (amount adjustable with Maths' fourth attenuverter) and VCA.
I also have the inverted output of the sequence patched to control Maths' channel 1 speed. By toggling Cycle for that channel I can add the looping envelope to the sequence, which then modulates both itself and the note pitch. This makes for some pretty cool, clangorous FM sounds at audio rates, and just wild pitch sweeps with the rates turned down. It's worth exploring both positive and negative amounts of modulation (set by the channel 1 attenuverter) for different effects here.
Finally, the sound from Morgasmatron is sent to DLD, and processed by the delay channels. I have these patched out to left and right, but I'm also feeding back the Send B into Return A so that the echoes move back and forth. Since the sequence is generated by the DLD's own clock outputs it will always be in time with the delays, and this results in some nice rhythmic effects and syncopations.
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Thanks for watching! :)
Feel free to request upcoming module combinations from my rack, and check out the #3modulechallenge for more 3 module patches!
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