Arturia MINIBRUTE 2S, User Manual

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6.1.5.2. Envelope generators
Contrary to an LFO, an envelope generator does not provide a repeating pattern but is
controlled by the keyboard or Gate input. The AD ENVELOPE controls the amplitude of the
sound, while the ADSR ENVELOPE is dedicated to the Filter and affects the harmonic content
of the sound.

♪ : The patchbay allows the envelopes to be routed to other destinations and triggered by other
sources.
AD (Attack, Decay)
The AD envelope determines how the level changes over time when you play a note. By
changing its parameters (Attack and Decay) we can control how the sound fades in and
fades out. We experimented with the AD envelope [p.15] in the Quick start chapter.
ADSR (Attack, Decay, Sustain, Release)
The Attack, Decay, Sustain, and Release sliders control different stages of the Filter envelope.
Here's a quick walk-through of each stage.
• Set the AD ENVELOPE Attack and Decay sliders to minimum
• Turn the FILTER Cutoff knob to minimum
• In the OSC MIXER section,
◦
Lower the Osc 2 slider to minimum
◦
Lower the Osc 1 square wave slider to minimum
◦
Raise the Osc 1 sawtooth slider to maximum
The sawtooth wave has more harmonic content than the square wave, which will make it
easier to hear the impact each of the ADSR stages has on the filter.
Attack
Play a note. The sound will be very faint.
• Turn the FILTER section's FM1 knob clockwise to maximum
• Raise the ADSR Attack slider until it is 3/4 of the way up
Now play a note and hold it. The harmonic content of the sound will increase gradually until
the sound is very bright, and then it will fall off very quickly because the Decay slider is set
to minimum.
Decay
• Lower the ADSR Attack slider to minimum
• Play a note repeatedly and raise the ADSR Decay slider gradually until it is 3/4
of the way up
Now play a note and hold it. The sound will start quickly and be very bright, but the harmonic
content will be reduced gradually until the sound is very faint again. The decay time of the
filter envelope makes a major contribution to the character of a sound.
Arturia - User Manual MiniBrute 2S - Basics of synthesis 55