VOICE EDIT MODE
Filter 2 Type (Thru, LPF): Filter 2 can be used
only as a LPF.
Cutoff Freq (HPF = 0 Hz ... 11.66kHz
(0...114); LPF = 0 Hz ... 22.43 kHz (0...127)):
The cutoff frequency of each filter can be
adjusted independently. The number 0...127
displayed in parentheses indicates the data
value input when using the numeric keypad.
Note that the highest HPF setting is 11.66 kHz.
Ctrl (EG, LFO, EG-VA): Each of the two filters
can be controlled in a different way. For details,
see the explanations below for Ctrl = EG, Ctrl =
LFO, Ctrl = EG-VA.
Resonance (0...99): Higher settings of
resonance will result in a more pronounced peak
of emphasis at the cutoff frequency. This setting
will apply to both filters 1 and 2.
Velocity Sens (-7...+7): This determines how
the cutoff frequency of both filters will be affected
by key-on velocity. For positive settings
(+1...+7) the cutoff frequency will increase as
you play more strongly, resulting in a brighter
sound. For negative settings (-1...-7) the cutoff
frequency will decrease as you play more
strongly, resulting in a darker sound.
LFO Cutoff Sens (-7...+7): This determines
how Filter Modulation from the Main LFO will
affect the filters. This setting also determines
how sensitive the filters will be to the controller
assigned to Filter Bias in Voice common data
12. (F4) Controller (JUMP #228). Negative set-
tings will reverse the effect of the assigned
controller.
By setting filter 1 to HPF and filter 2 to LPF,
you can create a Band Pass Filter that passes
only a central band of frequencies.
Each of the SY77's filters has a slope of
12 dB/octave. This means that if the cutoff
frequency of a LPF is 1 kHz, frequencies at
2 kHz will be reduced by 12 dB and frequencies
at 4 kHz will be reduced by 24 dB. If you set
both filters 1 and 2 to LPF, set both to the same
cutoff frequency, and set both filter EGs in the
same way, the result will be the equivalent of a
single 24 dB/octave filter. The filter copy function
explained in 5.0 Copy filter is a quick way to give
both filters the same settings.
Type and Cutoff Freq: Filter 1 can be used either
as a Low Pass Filter (LPF) or as a High Pass
Filter (HPF), and filter 2 can be used only as a
LPF.
When set to LPF, filters 1 and 2 will allow
sound lower than the cutoff frequency to pass
unchanged, and will diminish the sound above
the cutoff frequency. When set to HPF, filter 1
will allow sound higher than the cutoff frequency
to pass, and will diminish the sound below the
cutoff frequency.
24 dB/octave filtering creates a sharp cutoff
which is quite obvious, while 12 dB/octave filter-
ing is a more subtle effect. Analog synthesizers
of the past have used both types. 12 dB/octave
filtering was considered especially suitable for
strings, and 24 dB/octave filtering was for brass
or synth bass sounds.
132
Содержание SY-77
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