FILTER SECTION
Special -
Button
When the special filter button is pressed the display shows:
The higher parameter is “Filter type”. In this case with a value of Res LPF.
This parameter determines what type of Special filter is applied. Use the Higher data knob to adjust this parameter. There are 9 dif-
ferent special filters. Each one is made up of 2 filter blocks. The “Hyper Resonant” types are in series & are the Res LPF, Res BPF
& Res HPF filters. These types are very resonant & the Filter width parameter allows the Cutoff frequencies of each filter block to
be set at different frequencies. The rest of the filter types have the 2 filter blocks in parallel. Again the Filter width parameter allows
the Cutoff frequencies of each filter block to be set at different frequencies. The range of this parameter is Res LPF, Res BPF, Res
HPF, Notch, LPF + LPF, BPF + BPF, HPF + HPF, LPF + BPF & BPF + LPF. This parameter is memorised with a program.
The lower parameter is “Width”. In this case with a value of 00.
This parameter determines the spacing/offset in filter cutoff frequencies between the two elements of the “Special” filters. This is a
duplicate of the Special type filter width parameter that is displayed on page 6 of the Filter menu. The reason for this is that it was
found to be nice when editing for the display to jump back to this parameter when editing & as this parameter is duplicated in th
Filter menu it will do that when the filter menu is selected. This can provide “Formant” type filters & speech like qualities can be
easily realised. The Filter width is calibrated in semitones & allows specific offsets to be easily created. The range of this parameter
is 000 to 127. Note that the Resonance modulation Knob in the Filter Modulation Matrix actually modulates the “Filter width” para-
meter & not the resonance when the “Special” filters are selected. The Resonance knob still retains its function as filter Resonance
when in this mode. This parameter is memorised with a program.
Adjusting the value of this parameter will alter the value in the Filter menu. It is not possible to have different values set in the 2
pages.
Frequency - Knob
This knob controls the “Cutoff Frequency” of the Filter. Fully Clockwise & the Filters Cutoff frequency is set to the highest position,
generally this produces a very trebly sound. Fully anticlockwise & the Filters Cutoff frequency is set to the lowest position, generally
producing a very mellow sound. The range of this parameter is 000 to 127. This parameter is memorised with a Program.
It is possible to set the Filter so that it Filters out all of the sound. This normally happens at extreme settings. i.e. The Frequency
knob set fully anticlockwise in Low Pass Filter mode or the Frequency knob set fully clockwise in the High Pass Filter mode.
Resonance - Knob
This knob controls the amount of Resonance the Filter has. The effect is to emphasise the harmonics around the Cutoff Frequency.
( Set by the Frequency knob above.) For this reason on some synths this control is known as Emphasis. Fully anticlockwise there
is no boosting of the Cutoff Frequency, but as you turn the knob clockwise this frequency will be boosted until fully clockwise it
goes in to oscillation producing a new pitched element. ( similar to feedback on an electric guitar ) Increasing the Resonance is
very good for bringing out modulation ( movement or change ) in the Filters Cutoff Frequency, such as TB303 basslines. The range
of this parameter is 000 to 127. This parameter is memorised with a Program.
Overdrive - Knob
This knob determines how much Overdrive is applied to the Filter. This can warm sounds up & give them a different harmonic con-
tent from the standard waveforms, “Warmer” sounds are produced by modelling the “Saturation effect” common in classic Analogue
Filters. Fully anticlockwise the signal will be unaffected by the Overdrive. Fully clockwise & full drive will be applied. This parame-
ters characteristics can be altered by the amount of mix level feed to the Filter. For really overdriven effects it is recommended that
all the oscillators are used & maximum Mix levels are used. The range of this parameter is 000 to 127. This parameter is memo-
rised with a Program.
NOTE:
NOTE:
NOTE:
NOTE:
Filter type Res LPF
Filter width O64
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Summary of Contents for Supernova II
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