applied-acoustics-systems ultra analog ユーザーズマニュアル
4.2
The Oscillator Module
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slightly detune the oscillator. When the Detune knob is in its center position, there is no detune
while turning it clockwise or anti-clockwise increases or decreases the pitch respectively.
while turning it clockwise or anti-clockwise increases or decreases the pitch respectively.
The pitch of the Oscillators module and can be modulated by the signal from the Keyboard
module and/or the LFO module. The amount of modulation from these sources is adjusted by
using the Kbd and the LFO gain knobs. In order for the oscillator to respond to the keyboard with
an equal tempered scale, the Kbd knob of the Oscillator module must be set to its center position.
In the case of the LFO knob, the center position corresponds to a variation of plus and minus one
octave around the pitch of the oscillator.
using the Kbd and the LFO gain knobs. In order for the oscillator to respond to the keyboard with
an equal tempered scale, the Kbd knob of the Oscillator module must be set to its center position.
In the case of the LFO knob, the center position corresponds to a variation of plus and minus one
octave around the pitch of the oscillator.
The Oscillator module includes a ramp generator which allows one to obtain a pitch variation
when a key is depressed. The Amount knob is used to set the starting pitch of the oscillator while
the Time knob determines the time for the pitch to glide from this starting value to the effective
pitch. When the LED of the inverter button next to the Amount knob is on, the starting pitch will
be below that of the note played and will then rise after the note is played. When the LED of the
inverter button is in its off position, the initial pitch will be higher than the pitch of the note played
and will then fall to the correct pitch. When the Amount knob is in its leftmost position there is no
pitch variation at the beginning of a note.
the Time knob determines the time for the pitch to glide from this starting value to the effective
pitch. When the LED of the inverter button next to the Amount knob is on, the starting pitch will
be below that of the note played and will then rise after the note is played. When the LED of the
inverter button is in its off position, the initial pitch will be higher than the pitch of the note played
and will then fall to the correct pitch. When the Amount knob is in its leftmost position there is no
pitch variation at the beginning of a note.
4.2.3
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 4.2.4 below), the sub-oscillator becomes unavailable and the
Sub knob is then used to fix the frequency Ratio between the synchronization frequency and the
oscillator frequency.
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 4.2.4 below), the sub-oscillator becomes unavailable and the
Sub knob is then used to fix the frequency Ratio between the synchronization frequency and the
oscillator frequency.
4.2.4
Synchronization
The Oscillator module features a hard synchronization mode which is toggled on or off with the
help of the sync switch. In this mode, the signal from the Oscillator is reset, or in other words
restarted, at each cycle of a synchronization or master clock signal as shown in Figure 4. In this
mode the perceived pitch is the same as that of the synchronization signal while the frequency of
the synced oscillator only affects the harmonic content of the resulting signal.
help of the sync switch. In this mode, the signal from the Oscillator is reset, or in other words
restarted, at each cycle of a synchronization or master clock signal as shown in Figure 4. In this
mode the perceived pitch is the same as that of the synchronization signal while the frequency of
the synced oscillator only affects the harmonic content of the resulting signal.
In sync mode, the frequency of the master clock is determined by the settings of the Octave,
Semi control and Detune controls as well as the pitch signal from the Keyboard module. The
frequency of the signal to be synced is determined with respect to the frequency of the master
clock signal with the help of the Ratio knob. The ratio between these two frequencies can vary
by a factor of 1 to 20 and is increased by turning the Ratio knob clockwise. The frequency of the
frequency of the signal to be synced is determined with respect to the frequency of the master
clock signal with the help of the Ratio knob. The ratio between these two frequencies can vary
by a factor of 1 to 20 and is increased by turning the Ratio knob clockwise. The frequency of the