Resonance ( Resonance Normalize ) Knob
This knob is dual function, When the FUNCTION select switch
is set to NORMAL this knob will control the Resonance of the
Filter. The control will boost frequencies at the Cut off frequen-
cy. On on some synthesizers this control is known as
Emphasis since it will emphasize certain frequencies. At the
zero position there is no effect. Turning clockwise slowly intro-
duces the emphasis.
If set fully clockwise, the Filter will begin to self oscillate, pro-
ducing a new pitched element (similar to feedback on an elec-
tric guitar).
When the FUNCTION select switch is set to SHIFT, this knob
controls the Resonance Normalize. At zero, when resonance
is applied, the main audio signal will remain at normal levels.
Adjusting clockwise will reduce the signal level in relation to
the resonance level. This control enables the Filter to emulate
20
Filter
Filter
The Filter is a Low Pass type. As the frequency knob is adjusted
anticlockwise, harmonics are gradually removed from the sound.
When almost closed, only the fundamental frequency remains.
Fully closed and no sound at all passes. This type of Filter is
musically the most useful, especially for bass sounds.
Cut off Switch
Controls how drastically the frequencies above the Cut off point
are removed from the sound. In the 12dB position, the Cut off
slope is gentle so higher harmonics are not attenuated (reduced
in volume) as sharply as they are when in the 24dB position.
Frequency ( Overdrive ) Knob
This knob is dual function, When the FUNCTION select switch is
set to NORMAL it controls the basic Cut off frequency of the fil-
ter. If set fully clockwise and the filter is wide open allowing all
frequencies (harmonics) produced by the Oscillators to sound.
As the knob is turned anticlockwise, the filter closes, cutting out
harmonics, starting with the highest, then increasingly lower ones
until only the fundamental or nothing at all is allowed to sound
(fully anticlockwise).
If there is silence when the VOLUME knob is turned up, it is most
likely that the Filter is fully closed. Turn the Frequency knob
clockwise to open the filter.
When the FUNCTION select switch is set to SHIFT, this knob
controls the Filter OVERDRIVE. Used in large amounts it will
have the effect of making the sound richer and slightly distorted.
Main features and operation
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