APPLIED ACOUSTICS SYSTEMS ULTRA ANALOG Instrukcja Użytkownika Pobierz pdf (Strona 24)

24 Parameters

Pitch

The pitch of the Oscillator module can be adjusted using

the Octave, Semi and Detune controls. The Octave control al-

lows one to transpose the pitch by octaves (upper or lower)

while the Semi control is used to transpose the pitch by semi-

tones. To adjust these parameters, click on the corresponding

button to select it and drag the mouse (or use the ﬁnger on a

track pad) up or down to select a value. The Detune knob is

used to slightly detune the oscillator. When the Detune knob is

in its center position, there is no detune while turning it clock-

wise or anti-clockwise increases or decreases the pitch respec-

tively.

The pitch of the Oscillators module can be modulated by

the pitch signal received from the MIDI keyboard and/or the

LFO module. The amount of modulation from these sources

is adjusted by using the Key and the VCO Detune gain knob

from the LFO module. In order for the oscillator to respond to

the keyboard with an equal tempered scale, the Key knob of the Oscillator module must be set to

its center position.

The Oscillator module includes a ramp generator which allows one to obtain a pitch variation

when a key is depressed. The Ramp modulation knob is used to set the starting pitch of the oscillator

while the Decay knob determines the time for the pitch to glide from this starting value to the

effective pitch. The starting pitch can be set from -72 to +72 semi-tones with respect to the effective

pitch by turning the Ramp knob clockwise. There is no pitch change when this control is in its

middle position.

Sub Oscillator

The Oscillator module is equipped with a sub-oscillator which generates a wave one octave below

the pitch of the oscillator. The shape of the sub-oscillator signal is a square wave when the wave

shape of the Oscillator is set to Rect or Saw and a sine wave when it is set to Sine. The amount of

this sub-oscillator signal in the output signal of the oscillator is adjusted with the Sub knob. When

this knob is fully turned to the left, the sub-oscillator is muted. Note that when the oscillator is

used in its Sync mode (see section 4.2.1 below), the sub-oscillator becomes unavailable.

Synchronization

The Oscillator module features a hard synchronization mode which is toggled on or off with the

help of the Hard Sync button. Synchronization involves a master and a slave oscillator. In this

mode, the signal from the slave Oscillator is reset, or in other words restarted, at the beginning

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