Anatomy Of An Envelope - Akai FORCE User Manual

Anatomy of an Envelope

An envelope creates a variable control signal. It can be used, for instance, to modulate the filter settings of a sound over
a given period of time.
For drum tracks, use the AD/AHDS selector to select an AD or AHDS envelope. When Sample Play is set to Note-On, it
will use an ADSR envelope.
Keygroup tracks always use AHDS envelopes. When Sample Play is set to Note-On, it will use an ADSR envelope.
With AHDS envelopes, the following happens when you trigger a
sample:
1. Within the period of time you have defined with the attack (Atk), the
sample volume rises to its maximum value.
2. The sample's maximum volume will be maintained during the
Hold phase.
3. During the Decay phase, the sample's volume will gradually drop
to the sustain level.
4. The sample's volume will stay at the sustain level (Sust) until the
pad is released.
With AD envelopes, the following happens when you trigger a sample:
1. Within the period of time you have defined with the attack (Atk), the
sample volume rises to its maximum value.
2. The sample's maximum volume will be maintained until its Decay
phase, when the sample's volume will gradually drop to zero over the
set duration. Tap the Type drop-down menu to select how the decay
functions:
•
Decay From Start: The volume will start decreasing
immediately after reaching its maximum level.
•
Decay From End: The maximum volume will be
maintained for a hold phase until it reaches the decay
phase.
With ADSR envelopes, the following happens when you trigger a
sample:
1. Within the period of time defined by Attack, the sample volume
rises to its maximum value.
2. During the Decay phase, the sample's volume will gradually drop
to the Sustain level.
3. The sample's volume will stay at the Sustain level until the note is
released.
4. The sample's volume will drop to "zero" over the duration set by
Release.
171