Akai MPC TOUCH User Manual page 233

With AD envelopes, the following happens when you trigger a sample:
1. Within the period of time you have defined with the Attack (Atk) parameter, 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. Click 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.
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