Sonic-charge Microtonic User Manual download pdf (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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