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This patch demonstrates the use of the Synthesis Technology Morphing Terrarium VCO (MT) as a complex LFO.

The MT is set to the lowest range and adjusted manually.  Its XY output modulates a CGS VCO on the linear FM input, DC-coupled.  XY is also sent to a CGS Slope Detector, which generates a gate signal when the LFO waveform is falling.  This triggers an envelope generator (one of four in the Mattson Quad AD, configured for A-R mode).  The EG controls a VCA for the output signal from the LPG.  The audio path on the top consists of the square wave out of the VCO, through a Thomas White Resonant Lopass Gate (LPG) and into the VCA.  I placed an attenuator between the LPG and the VCA input.

Back to the MT, the Z output directly controls the LPG cutoff frequency, and inverted controls the High CV of a Flight of Harmony Plague Bearer (PB).   Z out is also routed to a second CGS Slope Detector.  The lower audio path routes the sawtooth of the CGS VCO into the PB.  Like the top path, an envelope generator triggered by the slope detector controls the level of the PB output into the final mix.

A big variety of sounds can be obtained from this patch, depending on how the controls are set.  I manually played with the MT frequency, the Morph X, Y, and Z controls, and the MT Bank selection.  Except for bank selection, all of these can be voltage controlled, but this time I mainly wanted to set up a repeating pattern.  XY controls pitch, and also the gating of the LPG output.  Z controls the filters (inversely from each other), and also the gating of the PB output.  Different VCO initial frequency and other filter controls also impact the result.   The following take was made with just  a bit of knob twiddling on the Morph X pot during the recording.

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