Sonic Charge Microtonic - Manual (Page 16)

a negative amount with the random modulation mode is no different from a posi-
tive amount since the random modulator randomizes the pitch totally both up-
wards and downwards.)
‣ Pitch Modulation Rate
Range: depends on modulation mode, decaying: infinite ms down to 10ms, sine:
0Hz to 2 000Hz
(2kHz) , random: 0Hz to 20 000Hz (20kHz)
Default: 353.33ms / 17.78Hz / 100.0Hz
The
Rate parameter depends on the modulation mode. For Decaying Pitch
Modulation, the rate setting controls the time it takes the oscillator to go from the
highest frequency down to the base frequency (or from the lowest frequency and
up if the modulation amount is negative) . At minimum rate setting, the oscillator is
stuck at the highest / lowest frequency and never changes. Faster decay rates
usually makes the sound more sharp and “snappy”. For
Sine Pitch Modulation,
the rate setting controls the frequency with which the sine modulator oscillates.
Just as with the decaying mode, the minimum rate setting makes the oscillator
stick to its initial frequency and never change. The highest modulation rates gen-
erate an FM-like effect that can be used to create inharmonic sounds.
Random
Pitch Modulation uses a low-pass filtered noise as modulation source and for
this mode the rate controls the cutoff frequency of the low-pass filter. A low rate
setting modulates the pitch slowly and a high rate modulates the pitch rapidly. At
zero rate it simply randomizes the pitch by the chosen amount every time the
drum patch is triggered. At maximum rate the random modulator will cause a
controllable band of noise to be added to the oscillator.
‣ Oscillator Attack
Range: 0ms to 10 000ms (10s)
Default: 0ms
The
Oscillator Attack parameter controls the total time for the attack phase of
the oscillator envelope. The oscillator and noise section have separate amplitude
envelope generators
(noise envelopes are more complex and offer three different
shapes) . With the default attack setting of zero, the attack phase of the envelope
is eliminated and the oscillator triggers at full force directly. This causes a sharp
transient with a distinct clicking sound. If you desire a softer sound, you can re-
duce this click by increasing the attack time just a little. Longer attack times sug-
gests a sound that has been reversed in time due to the fact that the oscillator at-
tack phase is always exponential
(most synthesizers have a linear attack and an
exponential decay) .
‣ Oscillator Decay
Range: 10ms to 10 000ms (10s)
Default: 316.23ms
The
Oscillator Decay setting controls the time it takes for the oscillator to fade
from max to zero volume. The oscillator envelope always runs from maximum to
zero amplitude with an exponential decay curve
(the most natural sounding type
of decay) . (The observant reader may object that an exponential decay never
reaches zero, which is true in theory, thus the time setting is only an approximate.)
Noise Section
The Noise Generator is used to add noisy elements to the drum patch. For exam-
ple, it can be a noisy punch sound, such as the sound of a hand or a drumstick hit-
ting a drum, or the sound of the vibrating snares on a snare drum. The noise gen-
erator also features a stereo mode where two uncorrelated noise sources are used
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