FRONT PANEL FEATURES
FM CONTROLS
The FM INDEX knob located in the center of the module controls the global amount of both through
zero linear frequency modulation and exponential frequency modulation for VCO1 and VCO2.
The left THRU ZERO knob controls the amount of TZFM of VCO1 (attenuated by the FM INDEX knob).
The modulator for this TZFM is normalized to the SINE of VCO2. It’s possible to break this
normalization by connecting a signal to the LINEAR inputs. The left EXPONENTIAL knob controls the
amount of exponential frequency modulation of VCO1 (attenuated by the FM INDEX knob). The
modulator for this FM is normalized to the SINE of VCO2. It’s possible to break this normalization by
connecting a signal to the EXPO inputs.
VCO2 has the exact same controls (the knobs on the right side). The SINE of VC01 is normalized to
the FM inputs.
FM INPUTS
You can patch any bipolar signal into the FM INDEX inputs. The left input controls de global amount of
FM for VCO1, the right input controls the global amount of FM for VCO2. The FM INDEX knob acts as
an offset for whatever modulation you send into these inputs. These inputs accept bipolar signals.
The FM INDEX input for VCO1 is normalized to the FM INDEX input for VCO2 when you don’t patch
anything into the right FM INDEX input (indicated by the arrow).
The LINEAR inputs are inputs for an external modulator for the TZFM. These inputs are AC coupled so
it’s best to use a VCO instead of an LFO for the TZFM to behave like it’s intended. The THRU ZERO
knobs act as an attenuator for the external modulators. The EXPO inputs are inputs for an external
modulator. These inputs are not AC coupled and accept both AC (VCOs) and DC (LFOs, envelopes, ...)
signals. The EXPONENTIAL knobs act as an attenuator for the external modulators.
VORTEX / Complex Oscillator
7
FM inputs
FM controls
