middle setting (12 o'clock), you’ll hear a
wha-wha-
like effect when tweaking the
Cutoff
knob. At maximum resonance the
FILTER
starts auto-oscillating, which
superimposes a tonal pitch to the filtered sound. Also try out the different modes
(
LP
,
BP
,
HP
,
Notch
).
Let's tweak the
FILTER
Cutoff
and
Resonance
5.2 Sound modulations
Return again to our initialized, basic sound shown at the start of this chapter. Set
the
CONTROLS
section’s
MOD Wheel
switch to
Vibrato
. Now while playing the
keyboard, turn the modulation wheel. The vibrato modulates the oscillator at the
rate defined by the
VIBRATO
section’s
Rate
knob. Now toggle the switch to its
various settings; the upper position creates up-trills and the lower, down-trills.
Return the
MOD Wheel
to its minimum position and set the
CONTROLS
section’s
Aftertouch
switch to
Vibrato
. Play notes on the keyboard; increasing your finger’s
pressure on a key increases the amount of vibrato modulation. Reducing the finger
pressure reduces the amount of vibrato modulation.
Aftertouch
can also be
assigned to the
FILTER
Cutoff
.
As you’ve heard, the
Vibrato
modulation is very gentle and musical — which is
great, unless you want to produce weird space sound FX! For more pronounced
modulation effects we’ll use the
LFO
, which provides six different modulation
waveforms. These waveforms can modulate most of the other MiniBrute sections:
the
PWM
and
Metalizer
, oscillator
pitch
, filter
cutoff
and eventually, the sound’s
amplitude.
Let's have fun modulating the
OSCILLATOR
pitch. Set all sliders, pots, and switches
as shown in the initialized patch [5.1], then press a key and tweak the
LFO
section’s
Pitch
knob. Try different
Rate
knob settings too. Test and try the various
LFO
waveforms; for example select the fifth waveform (random steps), set the
CONTROLS
section’s
MOD Wheel
switch to
LFO Amt,
then adjust the
Pitch
knob to
maximum (clockwise). Press a key and adjust the modulation amount with the
Modulation
wheel.
The four modulation knobs let you adjust not only the modulation amounts, but
also their
polarity
(whether increasing modulation increases, or decreases, a
parameter value). This is particularly evident when modulating the Pitch with the
sawtooth modulation waveform. When turned toward the
+
mark, the pitch glides
up slowly to the highest pitch, then snaps back to the lowest pitch. When turned
toward the
–
mark, the pitch glides down to the lowest pitch, then snaps back to
the highest pitch.
Arturia MiniBrute User's Manual
46
5 Using your MiniBrute