Soundtoys PhaseMistress - Manual (Page 42)

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Trigger
Press and hold the Trigger button to trigger the ADSR envelope. As long as you hold
the button the envelope will move through the Attack, Decay and Sustain portions of
the envelope. The modulation envelope will increase the phase frequency and attack
to its maximum value, then decay to the sustain value based on the settings of the
individual Attack, Decay and Sustain knobs. When the trigger button is released, the
envelope will decrease to zero (release) based on the setting of the Release knob.
Threshold
You can also trigger the ADSR based on the level of the input signal. Just set the
Threshold knob to a value other than maximum value. Each time the input signal
moves above the Threshold level the envelope will be triggered. If you don’t want the
audio to trigger the ADSR make sure the Threshold is set to its maximum value.
A - (Attack)
The Attack knob determines how fast the envelope will increase to its maximum
value once it has been triggered. The lower the setting of the Attack knob the faster
the attack time! As you increase the setting of the Attack knob the attack time will
get longer / slower (like increasing the Smoothing parameter) Keep in mind that the
possible modulation level goes from a hypothetical 0 to 100%, so the Attack time
determines how fast the envelope modulation signal will move from a level of "0" to
a level of "100".
D - (Decay)
Once the Attack has reached its maximum value, the envelope moves to the Decay
stage and the modulation signal "decays" then until the Sustain value is reached.
The Decay knob controls the speed or length of the decay time. The lower the set-
ting of the Decay knob, the faster the decay time will be. Conversely, the higher the
setting of the Decay knob the longer the decay time will be and the longer it will take
to reach the Sustain level.
S - (Sustain)
The Sustain knob controls at what level (between 0 –100%) the envelope will "hold"
or sustain at as long as the Trigger button is held down, or, as long as the input sig-
nal is above the Threshold setting.
R - (Release)
The Release knob adjusts the time it takes for the envelope signal to move from the
Sustain level back to a "0" level once the Trigger button is released, or after the
input goes below the Threshold.