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This naming convention works because the term "AHR" is nowhere near as universally accepted
as "ADSR" or even AR. The AHR envelope has also been called an ASR, AHD, or even a Trapezoid! (The
pioneering EMS Synthi VCS3 used that term for its Envelope Shaper.)
Despite all of this, the simplest envelopes remain the most popular and easy to use, and the
MiniFreak's envelopes are based on these designs.
10.2. Envelope
The MiniFreak Envelope is an ADSR, with four dedicated knobs for its four stages: Attack,
Decay, Sustain, and Release. Remember that Sustain sets a level while the other three knobs
set times.
As you turn each knob, the Display will show an envelope curve reflecting the current
settings. It will change shape as you adjust the stages, with parameter values shown
underneath the curve.
10.2.1. The VCA
The Envelope has one hard-wired modulation destination: the
Voltage Controlled Amplifier
(VCA), which controls the volume of the audio signal. It can modulate other things, but those
modulation routings have to be set in the Modulation Matrix [p.7] as needed.
While the VCA is the necessary third part of the classic VCO > VCF > VCA routing, it often
needs no controls of its own besides a volume envelope. That's why it doesn't have its own
big chapter in this manual to go with the
Digital Oscillators [p.20] or the Analog Filter [p.40].
10.2.2. Sound Edit > Envelope extras
In addition to these four important knobs, the Envelope has some hidden capabilities found
in the
Sound Edit [p.71] > Envelope menu.
Click the Sound Edit button and scroll down to Envelope, then click the Preset/Edit encoder to
open up the Envelope menu. You can then select and edit which parameter you're interested
in, by scrolling and clicking.
The Envelope controls
Arturia - User Manual MiniFreak - The Envelopes 66
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