APPLIED ACOUSTICS SYSTEMS ULTRA ANALOG Manual de usuario descargar pdf (Pagina 43)

4.7 The Envelope Module 43

a legato effect. The default strategy is the ﬁrst one while the second one will be applied when

the Legato button is depressed (green light on). Note that when the Keyboard is in polyphonic

mode and the envelope generator in legato mode, the envelope generator behaves in a monophonic

manner, reacting to a logical OR between all the gates signal from the different notes played on the

keyboard. In other words the envelope generator will only be trigged by the ﬁrst note played on the

keyboard and then remain in the sustain stage until the last note is released.

4.7.4 Loop Modes

The envelope generator features three loop modes: AD, ADR and Once. These modes allow the

envelope to cycle between several stages of the envelope until the key is released and are selected

from the Loop drop-down menu.

A D

Time

Looping through ADR RR

Key Released

Amplitude

A D

Time

RANormal Sustain

Key Released

Amplitude

A D

Time

RLooping through AD

Key Released

Amplitude ADR Mode

Once Mode

AD Mode

Figure 20: Loop mode of an envelope generator.

In the AD mode, the envelope begins with the attack and decay phases as usual, but rather than

holding the sustain level, it repeats the attack (from the sustain level) and the decay phases until

the note is released. When the note is released the envelope signal returns to zero following the

release phase. The ADR mode is quite similar to the preceding mode and only differs in that the

looping is done by cycling trough the attack, decay and release phases. Finally, in the Once mode,

the envelope is played normally but the envelope generator cycles once more through the attack

and release phase when the key is released.

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APPLIED ACOUSTICS SYSTEMS ULTRA ANALOG Manual de usuario Pagina 43