17
Per-Filter parameters
Filter 1 is used as the example in the descriptions which follow, but the two are identical in
operation, except where indicated.
Parameter: Filter frequency
Displayed As: F1Freq
Default value: 127
Range of adjustment: 0 to 127
This parameter sets the frequency at which the filter type selected by F1Type operates.
In the case of hi-pass or low-pass filters, it is the “cut-off” frequency; for band-pass filters,
it is the “centre” frequency. Sweeping the filter manually will impose a “hard-to-soft”
characteristic on almost any sound.
If Filter Frequency Link is set On (see FreqLink below), F2Freq assumes a
different function:
Parameter: Filter 2 frequency offset
Displayed As: Fq1<>Fq2
Default value: +63
Range of adjustment: -64 to +63
See “Parameter: Filter Frequency Link” on page 19 for more information.
Parameter: Filter resonance
Displayed As: F1Res
Default value: 0
Range of adjustment: 0 to 127
This parameter adds gain to the signal in a narrow band of frequencies around the
frequency set by F1Freq. It can accentuate the swept-filter effect considerably. Increasing
the resonance parameter is very good for enhancing modulation of the cut-off frequency,
creating a very edgy sound. Increasing Resonance also accentuates the action of the Filter
Frequency parameter, so that as the FILTER knob [14] is moved, a more pronounced effect
is obtained.
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F1Res can be also adjusted directly from Row 3 of the PERFORM section of the
control panel with Tweak Control RC1.
If Filter Resonance Link is set On (see ResLink page 19), the values of filter
resonance for Filters 1 and 2 become equal and are varied by either control.
Parameter: Filter 1 & 2 resonance
Displayed As: F1&F2Res
Default value: not applicable
Range of adjustment: 0 to 127
Parameter: Filter control by Envelope 2
Displayed As: F1Env2
Default value: 0
Range of adjustment: 0 to 127
The filter’s action may be triggered by Envelope Generator 2. Envelope 2’s own menu
provides comprehensive control over precisely how this shape of the envelope is derived,
see “Filter Envelope” on page 22. F1Env2 lets you control the “depth” and “direction”
of this external control; the higher the value, the greater the range of frequencies over
which the filter will sweep. Positive and negative values make the filter sweep in opposite
directions, but the audible result of this will be further modified by the filter type in use.
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F1Env2 can be also adjusted directly from Row 4 of the PERFORM section of
the control panel with Tweak Control RC4.
Parameter: Filter tracking
Displayed As: F1Tra c k
Default value: 127
Range of adjustment: 0 to 127
The pitch of the note played can be made to alter the cut-off frequency of the filter. At the
maximum value (127), this frequency moves in semitone steps with the notes played on
the keyboard – i.e., the filter tracks the pitch changes in a 1:1 ratio (e.g., when playing
two notes an octave apart, the filter cut off frequency will also change by one octave).
At minimum setting (value 0), the filter frequency remains constant, whatever note(s) are
played on the keyboard.
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F1Tra c k can be also adjusted directly from Row 3 of the PERFORM section of
the control panel with Tweak Control RC2.
Parameter: Filter type
Displayed As: F1Ty p e
Default value: LP24
Range of adjustment: See Filter Table on page 38
The MiniNova filter sections offer 14 different types of filter: four hi-pass and four low-
pass (with different slopes), and 6 band-pass filters of various types. Each filter type
differentiates between frequency bands in a different way, rejecting some frequencies and
passing others, and thus each imposes a subtly different character on the sound.
Parameter: Drive Amount
Displayed As: F1DAmnt
Default value: 0
Range of adjustment: 0 to 127
The filter section includes a dedicated drive (or distortion) generator; this parameter
adjusts the degree of distortion treatment applied to the signal. The basic ‘type’ of drive
added is set by F1DType (see below). The drive is added pre the filter (but see below).
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F1DAmnt can be also adjusted directly from Row 3 of the PERFORM section
of the control panel with Tweak Control RC4.
Filter Drive is always added before the filter, and therefore the filter frequency
affects the amount of drive you hear. If you want to filter your sound before it is
treated by the drive processor, try settings similar to the following:
PARAMETER IN MENU VALUE
FRouting FiltrCmn Series
FBalance FiltrCmn 63
F1DAmnt Filter 1 0
F2DAmnt Filter 2 As required
Parameter: Drive Type
Displayed As: F1DType
Default value: Diode
Range of adjustment: Diode, Valve, Clipper, XOver, Rectify, BitsDown, RateDown
The drive processor for each filter is located immediately before the filter section itself. The
type of drive (or distortion) generated can be selected with the F1DType parameter.
Parameter: Filter Q Normalisation
Displayed As: F1QNorm
Default value: 64
Range of adjustment: 0 to 127
This parameter alters the bandwidth of the peak created by the resonance control F1Res.
The value of F1Res has to be set to something other than zero for this parameter to have
any effect. This feature enables the Filter section to emulate many of the filter responses
found on various classic analogue and digital synths.
Low Resonance,
Low Q Normalization
High Resonance,
Low Q Normalization
High Resonance,
High Q Normalization
Cut-off
Frequency
Common Filter parameters
With Filter number set to FiltrCmn, the displayed parameters in the Filter Menu are
common to both filters.
Parameter: Filter balance
Displayed As: FBalance
Default value: -64
Range of adjustment: -64 to +63
MiniNova’s two filter sections may be used simultaneously, but configured in different
ways (see FRouting below). Low-pass and band-pass filters could be combined in
parallel to create speech-like sounds (see page 19). For configurations using both
filters, FBalance lets you mix the outputs of the two filter sections together in whatever
combination you want. The minimum parameter value of -64 represents maximum output
from Filter 1 and no output from Filter 2, and the maximum value of +63 represents
maximum output from Filter 2 and no output from Filter 1. With a value of 0, the outputs of
the two filter sections are mixed in equal proportion.
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F1Ty p e can be also adjusted directly from Row 3 of the PERFORM section of
the control panel with Tweak Control RC3.
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