Sub-Oscillator / Audio mixer

is actually a part of the VCO and generates a pitch one- or two-octaves lower than that of the VCO. Three types of waves are available: a one-octave lower square wave, a two-octave lower square wave and a two-octave lower square wave and a two-octave lower pulse wave. Mixing the sub-oscillator output with the VCO output will give new dimensions to your sound, as if two VCO's were used.The audio mixer mixes outputs of the VCO, Sub-oscillator and the external input signal.

VCF (Voltage Controlled Filter)

is a low pass filter whose cutoff frequency can be controlled by means of a control voltage. The VCF is used to alter tone colors by cutting or boosting harmonics in the signals sent from the VCO.



1. Cutoff Freq Control

This control determines the frequencies which will be removed by the VCF. At its highest position, all sound passes through the VCF without change, thus this may by considered its normal position. If the control is slowly lowered, it will begin to shave off the upper harmonics of the sound passing through the VCF.

3. Envelope

This switch determines the source of envelope control for the VCF. In the center position, the VCF cutoff frequency point will rise, following the shape of the envelope, each time the envelope generator is triggered. In the lower position, the cutoff of the VCF will fall, following the envelope pattern. In the upper position, the VCF cutoff point will follow the envelope of any audio signal appearing at the EXT AUDIO IN jack on the rear panel.
The LFO is an oscillator which generates waveforms of a low frequency. The range is from about 0.2 Hz to about 25 Hz. The output of the LFO can be used for modulating the VCO of VCF, and for triggering the envelope generator.
The S/H produces random signals by sampling the output from the noise generator at a rate determined by the LFO.		 2. Resonance Control

This control accents the frequencies at the cutoff point of the VCF. At "0", this control has no effect. The effect will become stronger, the higher the control is raised.With the control at a high position, moving the CUTOFF FREQ slider will produce sounds peculiar to the synthesizer.

4. Envelope Control

With this control raised, the cutoff point of the VCF will change during the production of each note. This type of VCF modulation is very often used with brass sounds.

5. MOD Control

This control allows the VCF cutoff point to be controlled by the MODULATOR (LFO) section. Using the sine wave output of the MODULATOR produces growl effects. This control is also effective for processing of external input signals. Continous wah wah effects can be added to electric guitar or other keyboards.