Akai XR 20 Reference Manual page 26

PAGE 7: ATTACK ENVELOPE (SYNTH ONLY)
The attack envelope (Synth only) affects how the Synth sound will play after you hit the pad.
Attack determines the amount of time it takes for the Synth sound to "fade in" after it has
been triggered. With longer attack times, it takes longer for the sound to reach full volume
after it has been triggered.
Note that the Attack setting cannot be set
individually per pad. In other words, changing the
Attack setting will affect the Attack setting for all
pads in the Synth group.
To change the Synth attack envelope:
1. Select the Synth group by pressing SYNTH.
2. Enter the desired Attack setting for the sound,
using the number buttons, INC/DEC buttons,
or VALUE dial.
PAGE 8: DECAY ENVELOPE
The Decay envelope is available for all Pad Play Modes (Drums, 1-Shot, Synth) and affects
the amount of time before the sound stops ringing out. This allows you to get the effect of a
deep drum sound that will decay over a specific period, or with a short decay time, a short
staccato hit.
To change a pad's decay envelope:
1. Select the sound set which you would like to
edit by pressing DRUM, 1-SHOT or SYNTH.
2. Press the pad (the display will show the pad
number).
3. Enter the desired Decay amount for the
sound, using the number keypad, INC/DEC
buttons, or VALUE dial.
Note: Setting the decay envelope to 0 allows you to sustain the selected sample for as
long as the corresponding pad is held down.
PAGE 9: RELEASE ENVELOPE (SYNTH ONLY)
The Release envelope parameter (Synth only) describes the amount of time that it takes for
the Synth sound to "fade out" after you release the pad.
Note that the Release setting cannot be set individually per pad. In other words, changing
the Release setting will affect all pads.
To change a Synth pad's Release envelope:
1. Press the pad (the display will show the pad
number).
2. Enter the desired Release amount for the
sound, using the number keypad, INC/DEC
buttons, or VALUE dial.
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